Structural Organisation of Animals Online Test 10th Science Lesson 13 Questions in English

Structural Organisation of Animals Online Test 10th Science Lesson 13 Questions in English

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Question 1
Kingdom Animalia is divided into____ groups
A
3
B
2
C
5
D
4
Question 1 Explanation: 
The variety in nature and habits of animals in the biosphere are quite amazing and interesting. t ‘Kingdom Animalia’ is divided into two groups, Invertebrates and Chordates.
Question 2
Which of the following is correctly matched?
  1. Invertebrate - Leech
  2. Vertebrate  - Rabbit
A
1 alone
B
2 alone
C
1, 2
D
None
Question 2 Explanation: 
Kingdom Animalia has a great diversity in the habit, habitat, structural organisation and mode of reproduction between the animals existing on earth. In this chapter, you will understand the structural morphology and anatomy of an Invertebrate (Leech) and a Vertebrate (Rabbit).
Question 3
The scientific name of the Indian cattle leech is_______
A
Bos nomadicus
B
Bos elephantis
C
Hirudinaria granulosa
D
Oryctolagus cuniculus
Question 3 Explanation: 
The scientific name of the Indian cattle leech is Hirudinaria granulosa which belongs to Phylum Annelida. Annelids are metamerically segmented worms with well-developed organ systems.
Question 4
The scientific name of the common rabbit is____
A
Bos nomadicus
B
Bos elephantis
C
Hirudinaria granulosa
D
Oryctolagus cuniculus
Question 4 Explanation: 
The scientific name of the common rabbit is Oryctolagus cuniculus. It represents Phylum Chordata and Class Mammalia.
Question 5
Which of the following statement about mammals is correct?
  1. Mammals occupy the highest group in the animal kingdom and show advancement over the other groups of animals
  2. Mammary gland in females is the most striking feature of a mammal
  3. They are cold blooded and possess covering of hair on the body
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 5 Explanation: 
Mammals occupy the highest group in the animal kingdom and show advancement over the other groups of animals. They are warm blooded and possess covering of hair on the body. Mammary gland in females is the most striking feature of a mammal.
Question 6
Match the Taxonomic Position of Indian Cattle Leech:
  1. Phylum                              1. Hirudinaria
  2. Order                                 2. Annelida
  3. Genus                                3. Hirudinea
  4. Class                                  4. Gnathobdellida
A
1, 2, 3, 4
B
3, 2, 1, 4
C
2, 4, 1, 3
D
2, 3, 1, 4
Question 7
Hirudinaria granulosa (Indian Cattle Leech) is found in_____
A
India
B
Pakistan
C
Sri Lanka
D
All the above
Question 7 Explanation: 
Hirudinaria granulosa (Indian Cattle Leech) is found in India, Bangladesh, Pakistan, Myanmar and Sri Lanka. It lives in freshwater ponds, lakes, swamps and slow streams.
Question 8
Indian Cattle Leech is______
A
Endoparasite
B
Ectoparasite
C
Omiparasite
D
None
Question 8 Explanation: 
Hirudinaria granulosa (Indian Cattle Leech) are ectoparasitic and feed on the blood of fishes, frogs, cattle and human. It is sanguivorous (blood sucking) in nature.
Question 9
Which of the following statement about leech is correct?
  1. The body of a leech is soft, vermiform, elongated and segmented.
  2. Dorsal surface is blue in colour and the ventral surface is orange yellow or orange red in colour
  3. It becomes ribbon shaped when extended and almost cylindrical when contracted
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 9 Explanation: 
The body of a leech is soft, vermiform, elongated and segmented. It becomes ribbon shaped when extended and almost cylindrical when contracted. Leeches may grow to a length of 35cm. Dorsal surface is olive green in colour and the ventral surface is orange yellow or orange red in colour.
Question 10
The body of leech is metamerically divided into____ segments
A
22
B
33
C
19
D
55
Question 10 Explanation: 
Metamerism is the segmentation of the body. The body of leech is metamerically divided into 33 segments. The segments are arranged one behind the other.
Question 11
How many pairs of eyes does leech have?
A
10
B
2
C
1
D
5
Question 11 Explanation: 
On the dorsal side there are five pairs of eyes on the first five segments. Each segment bears a number of sensory projections called receptors.
Question 12
A temporary clitellum is formed on which segment is meant to produce a cocoon?
A
10 – 11
B
9 – 11
C
13 – 15
D
7 – 11
Question 12 Explanation: 
Each segment is further superficially subdivided into rings or annuli. A temporary clitellum is formed on segments 9-11, which is meant to produce a cocoon during the breeding season.
Question 13
Which of the following statement about leech is correct?
  1. Leech has two suckers
  2. Posterior suckers help in attachment and locomotion.
  3. The sucker located at the anterior end is called anterior sucker or oral sucker
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 13 Explanation: 
Leech has two suckers. The sucker located at the anterior end is called anterior sucker or oral sucker which is ventral in position occupying the first five segments. The posterior sucker is formed by the fusion of the last seven segments. The anterior sucker helps in feeding, while both the suckers help in attachment and locomotion.
Question 14
Anus of leech opens at____ segment
A
12th
B
26th
C
22nd
D
13th
Question 14 Explanation: 
Mouth is located in the middle of anterior sucker. Anus is a small aperture that opens on the mid-dorsal side of 26th segment.
Question 15
Nephridia open to the exterior by____ pairs of nephridiopores
A
25
B
17
C
29
D
15
Question 15 Explanation: 
Nephridia open to the exterior by 17 pairs of nephridiopores. They lie ventrally on the last annulus of each segment from 6 to 22.
Question 16
Match the following with respective segments
  1. Cephalic region                              1. 27th - 33rd
  2. Clitellar region                               2. 1st - 5th
  3. Middle region                                 3. 9th, 10th and 11th
  4. Posterior sucker                              4. 12th - 22nd
A
1, 2, 3, 4
B
2, 3, 4, 1
C
2, 4, 1, 3
D
2, 3, 1, 4
Question 17
Which of the following statement about body wall of leech is correct?
  1. Body wall of leech includes three layers
  2. Cuticle is the outermost layer
  3. Dermis which lies below the epidermis formed of connective tissue
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 17 Explanation: 
Body wall of leech includes five layers: (i) cuticle (outermost layer) (ii) epidermis which lies below the cuticle (iii) dermis which lies below the epidermis formed of connective tissue (iv) muscular layer formed of circular and longitudinal muscles (v) botryoidal tissue lies beneath longitudinal muscles and fills the entire coelom around the gut.
Question 18
How many types of movements take place in leech?
A
2
B
4
C
5
D
3
Question 18 Explanation: 
Locomotion in leech takes place by two methods: (i) looping or crawling movement (ii) Swimming movement.
Question 19
Which of the following statement is correct?
  1. Looping or Crawling movement is brought about by the contraction and relaxation of muscles
  2. Leeches swim very actively and perform undulating movements in water.
A
1 alone
B
2 alone
C
1, 2
D
None
Question 19 Explanation: 
Looping or Crawling movement is brought about by the contraction and relaxation of muscles. The two suckers serve for attachment during movement on a substratum. Leeches swim very actively and perform undulating movements in water.
Question 20
Mouth of leech is____ aperture situated in the middle of the anterior sucker.
A
Biradiated
B
Triradiated
C
Monoradited
D
Pentaradiated
Question 20 Explanation: 
The alimentary canal of leech is a straight tube running from the mouth to the anus. Mouth is a triradiate aperture situated in the middle of the anterior sucker that leads into the small buccal cavity
Question 21
The wall of the buccal cavity of leech bears_____ jaws with single row of minute teeth
A
3
B
4
C
7
D
2
Question 21 Explanation: 
The wall of the buccal cavity of leech bears three jaws with single row of minute teeth. The jaws are provided with papillae which bear the openings of salivary glands. Mouth and buccal cavity occupy the first five segments.
Question 22
Pharynx of leech leads into crop through a short and narrow_____
A
Bronchus
B
Larynx
C
Oesophagus
D
Bronchioles
Question 22 Explanation: 
The buccal cavity leads into muscular pharynx. It is surrounded by salivary glands. The secretion of saliva contains hirudin which prevents the coagulation of blood. Pharynx leads into crop through a short and narrow oesophagus
Question 23
Which of the following statement is correct in leech?
  1. The last chamber of crop opens into stomach.
  2. Crop is the largest portion of the alimentary canal.
  3. The rectum opens to the exterior by anus.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 23 Explanation: 
Crop is the largest portion of the alimentary canal. It is divided into a series of 10 chambers. The chambers communicate with one another through circular apertures surrounded by sphincters. The last chamber of crop opens into stomach. The stomach leads into intestine which is a small straight tube that opens into rectum. The rectum opens to the exterior by anus.
Question 24
During feeding the leech attaches itself to its victim strongly by____ sucker
A
Anterior
B
Posterior
C
Both a and b
D
None
Question 24 Explanation: 
The leech feeds by sucking the blood of cattle and other domestic animals. During feeding the leech attaches itself to its victim strongly by the posterior sucker.
Question 25
In leech the blood is sucked by_____
A
Jaw
B
Pharynx
C
Larynx
D
Tongue
Question 25 Explanation: 
The leech makes a triradiate or Y shaped incision in the skin of the host by the jaws protruded through the mouth. The blood is sucked by muscular pharynx and the salivary secretion is poured.
Question 26
Digestion in leech takes place in stomach by the action of____ enzyme
A
Lipase
B
Proteolytic
C
Amylase
D
Pepsin
Question 26 Explanation: 
Explanation The blood passes from the crop into the stomach. Digestion takes place in stomach by the action of proteolytic enzyme. The digested blood is then absorbed slowly by the intestine. Undigested food is stored in rectum and egested through anus.
Question 27
Leeches prevent blood clottng by secreting a protein called_____
A
Lipase
B
Leucocyte
C
Hirudin
D
Haemoglobin
Question 27 Explanation: 
Leeches prevent blood clotting by secreting a protein called hirudin. They also inject an anaesthetic substance that prevents the host from feeling their bite.
Question 28
  • Assertion(A): Leeches can sense vibrations through their skin.
  • Reason(R): Leeches do not have ear
A
Both (A) and (R) are correct, but (R) does not explain (A)
B
Both (A) and (R) are wrong
C
Both (A) and (R) are correct and (R) explains (A)
D
(A) is Correct and (R) is wrong
Question 28 Explanation: 
Leeches do not have ear, hence can sense vibrations through their skin. Leeches have 2 to 10 tiny eyes, which helps them to locate their food.
Question 29
Leeches can suck blood___ times more than their body weight
A
9
B
5
C
10
D
15
Question 29 Explanation: 
Leeches can suck blood five times more than their body weight. It may take more than a year for the complete digestion and absorption of a full meal.
Question 30
Respiration takes place through the____ in leech
A
Nostril
B
Jaw
C
Anus
D
Skin
Question 30 Explanation: 
Respiration takes place through the skin in leech. Dense network of tiny blood vessels called as capillaries containing the haemocoelic fluid extend in between the cells of the epidermis.
Question 31
The exchange of respiratory gases in leech takes place by_____
A
Osmosis
B
Diffusion
C
Pressure
D
None
Question 31 Explanation: 
The exchange of respiratory gases takes place by diffusion. Oxygen dissolved in water diffuses through the skin into haemocoelic fluid, while carbon dioxide diffuses out. The skin is kept moist and slimy due to secretion of mucus which also prevents it from drying.
Question 32
In leech, circulation is brought about by____ system
A
Respiratory
B
Haemocoelic
C
Haemophrage
D
None
Question 32 Explanation: 
In leech, circulation is brought about by haemocoelic system. There are no true blood vessels. The blood vessels are replaced by channels called haemocoelic channels or canals filled with blood like fluid.
Question 33
How many longitudinal channels are there in leech Circulatory System?
A
6
B
4
C
1
D
3
Question 33 Explanation: 
In leech, there are four longitudinal channels. One channel lies above (dorsal) the alimentary canal, one below (ventral) the alimentary canal. The other two channels lie on either (lateral) side of the alimentary canal which serve as heart and have inner valves. All the four channels are connected together posteriorly in the 26th segment.
Question 34
In leech, excretion takes place by segmentally arranged paired tubules called____
A
Neurodia
B
Nephridia
C
Nervodia
D
None
Question 34 Explanation: 
In leech, excretion takes place by segmentally arranged paired tubules called nephridia. There are 17 pairs of nephridia which open out by nephridiopores from 6th to 22nd segments.
Question 35
Which of the following statement is correct?
  1. Leech is hermaphrodite
  2. They have male and female reproductive organs are present in the same animal
A
1 alone
B
2 alone
C
1, 2
D
None
Question 35 Explanation: 
Leech is hermaphrodite because both the male and female reproductive organs are present in the same animal.
Question 36
How many pair of testes are there in leech?
A
7
B
11
C
13
D
14
Question 36 Explanation: 
There are eleven pairs of testes in leech, one pair in each segment from 12 to 22 segments. They are in the form of spherical sacs called testes sacs.
Question 37
Which of the following are contained in Female Reproductive System of leech?
  1. Ovaries
  2. Oviducts
  3. Epididymis
  4. Vagina
A
1, 2, 4
B
1, 3, 4
C
2, 3, 4
D
All the above
Question 37 Explanation: 
Female Reproductive System consists of ovaries, oviducts and vagina. There is a single pair of ovary in the 11th segment on the ventral side. Each ovary is a coiled ribbon-shaped structure.
Question 38
In leech, vagina which lies mid-ventrally in the posterior part of the___ segment
A
11th
B
12th
C
19th
D
21st
Question 38 Explanation: 
The ova are budded off from the ovary. From each ovary runs a short oviduct. The oviducts of the two sides joins together, to form a common oviduct. The common oviduct opens into a pear-shaped vagina which lies mid-ventrally in the posterior part of the 11th segment.
Question 39
Cocoon is also known as egg case which is formed around______ segments
  1. 3rd
  2. 9th
  3. 10th
  4. 11th
A
1, 2, 4
B
1, 3, 4
C
2, 3, 4
D
All the above
Question 39 Explanation: 
Internal fertilization takes place. This is followed by cocoon formation. Cocoon is also known as egg case which is formed around the 9th, 10th and 11th segments.
Question 40
How many embryos are found in cocoon?
A
1 to 10
B
12 to 18
C
1 to 24
D
15 to 25
Question 40 Explanation: 
Development is direct and proceeds in cocoon which contain one to 24 embryos. Young leech resembling the adult emerges.
Question 41
Which of the following statement is incorrect?
  1. Leeches are effective in increasing blood circulation and breaking up blood clots
  2. Biochemical substances derived from leech saliva are used for preparation of pharmaceutical drugs that can treat hypertension
A
1 alone
B
2 alone
C
1, 2
D
None
Question 41 Explanation: 
Leeches are effective in increasing blood circulation and breaking up blood clots. It is surprising that they can be used to treat cardiovascular diseases. Biochemical substances derived from leech saliva are used for preparation of pharmaceutical drugs that can treat hypertension.
Question 42
Match the following of Rabbit correctly:
  1. Phylum                              1. Oryctolagus
  2. Order                                 2. Chordata
  3. Class                                  3. Mammalia
  4. Genus                                4. Lagomorpha
A
1, 2, 3, 4
B
2, 3, 4, 1
C
2, 4, 1, 3
D
2, 3, 1, 4
Question 43
The pygmy rabbit was listed as a threatened species in Washington in_____
A
1991
B
1990
C
1970
D
1979
Question 43 Explanation: 
The pygmy rabbit was listed as a threatened species in Washington in 1990, because of decline in its population size and distribution due to habitat loss. In March 2003, the Columbia Basin Pygmy Rabbit was federally listed as an endangered species.
Question 44
Which of the following statement is correct about Rabbit?
  1. It has an elongated and cylindrical body
  2. They grow about 45 cm in length and weigh about 2.25 kg as adult.
  3. Body is covered with fur which serves to keep it warm.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 44 Explanation: 
Rabbit has an elongated and cylindrical body. Males and females are of the same size. They grow about 45 cm in length and weigh about 2.25 kg as adult. The colour varies from white to black and white. Body is covered with fur which serves to keep it warm.
Question 45
Which of the following statement rabbit is correct?
  1. The body of the rabbit is divisible into the head, neck, trunk and tail
  2. Head is ovoid, flattened and bears a truncate snout
  3. The mouth is a longitudinal slit-like bounded by upper lip and lower lip.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 45 Explanation: 
The body of the rabbit is divisible into the head, neck, trunk and tail. Head is ovoid, flattened and bears a truncate snout. It contains mouth, external nares, eyes, ears and vibrissae. The mouth is a transverse slit-like bounded by upper lip and lower lip. Just above the mouth are two oblique openings called nostrils. From each side of the upper lip tactile hairs or vibrissae (whiskers) project outwards.
Question 46
The trunk of rabbit is divisible into an anterior___ and a posterior_____
A
Thorax, Abdomen
B
Abdomen, Thorax
C
Trachea, Thorax
D
Thorax, Abdomen
Question 46 Explanation: 
The trunk of rabbit is divisible into an anterior thorax and a posterior abdomen. In females, four or five teats or nipples are present on the ventral surface between the thorax and abdomen.
Question 47
The trunk of rabbit bears two pairs of____ limbs
A
Pentadactyl
B
Pectadactyl
C
Hexactyl
D
Tridactyl
Question 47 Explanation: 
The trunk of rabbit bears two pairs of pentadactyl limbs. The forelimbs are shorter than the hind limbs. All the digits bear claws.
Question 48
The anus of the rabbit is present at the____ end of the abdomen at the base of tail
A
Anterior
B
Posterior
C
Dorsal
D
Ventral
Question 48 Explanation: 
The anus of the rabbit is present at the posterior end of the abdomen at the base of tail. In females on the ventral side a slit like vulva is present. In males, penis is present in the ventral side of anus. The male has a pair of testes enclosed by scrotal sacs.
Question 49
Which of the following are present in rabbit?
A
Sweat gland
B
Sebaceous gland
C
Mammary glands
D
All the above
Question 49 Explanation: 
The integument forms the outer covering of the body. The structures of rabbit which are derived from it are hairs, claws, nails and glands like sweat glands, sebaceous glands and mammary glands.
Question 50
Which of the following statement is correct?
  1. Mammary glands are modified glands of the skin.
  2. They secrete milk and help in nourishing young ones.
  3. The sweat glands and sebaceous glands embedded in the skin regulate the body temperature
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 50 Explanation: 
Mammary glands are modified glands of the skin. They secrete milk and help in nourishing young ones. The sweat glands and sebaceous glands embedded in the skin regulate the body temperature.
Question 51
Which of the following statement is correct?
  1. The body of rabbit is divisible into thoracic cavity and abdominal cavity
  2. Lungs and heart lie in the thoracic cavity
  3. Abdominal cavity encloses digestive and urinogenital system.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 51 Explanation: 
Rabbit is a coelomate animal. The body is divisible into thoracic cavity and abdominal cavity separated by transverse partition called diaphragm. Lungs and heart lie in the thoracic cavity, whereas, abdominal cavity encloses digestive and urinogenital system.
Question 52
_____is the characteristic feature of mammals
A
Arms
B
Anus
C
Diaphragm
D
Bones
Question 52 Explanation: 
Diaphragm is the characteristic feature of mammals. Breathing movements are brought by the movement of the diaphragm.
Question 53
Which of the following is not included in alimentary canal?
A
Pharynx
B
Oesophagus
C
Larynx
D
Caecum
Question 53 Explanation: 
The digestive system includes the alimentary canal and the associated digestive glands. The alimentary canal consists of mouth, buccal cavity, pharynx, oesophagus, stomach, small intestine, caecum, large intestine and anus.
Question 54
Which of the following statement is correct?
  1. Mouth is a longitudinal slit bounded by upper and lower lips
  2. The floor of the buccal cavity is occupied by a muscular tongue.
  3. Jaws bear teeth.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 54 Explanation: 
Mouth is a transverse slit bounded by upper and lower lips. It leads into the buccal cavity. The floor of the buccal cavity is occupied by a muscular tongue. Jaws bear teeth.
Question 55
In rabbit, Oesophagus opens into the stomach followed by_____
A
Large intestine
B
Caecum
C
Anus
D
Small intestine
Question 55 Explanation: 
Oesophagus opens into the stomach followed by small intestine. Caecum is a thin-walled sac present at the junction of small intestine and large intestine. It contains bacteria that helps in digestion of cellulose. The small intestine opens into the large intestine which has colon and rectum. The rectum finally opens outside by the anus.
Question 56
Which of the following glands are included in digestive glands?
A
Liver
B
Pancreas
C
Salivary glands
D
All the above
Question 56 Explanation: 
The digestive glands are salivary glands, gastric glands, liver, pancreas and intestinal glands. The secretions of digestive glands help in digestion of food in the alimentary canal.
Question 57
Which of the following statement is correct?
  1. Teeth are hard bone-like structures used to cut, tear and grind the food materials
  2. The existence of two sets of teeth in the life of an animal is called diphyodont dentition
A
1 alone
B
2 alone
C
1, 2
D
None
Question 57 Explanation: 
Teeth are hard bone-like structures used to cut, tear and grind the food materials. The rabbit has two sets of teeth. The existence of two sets of teeth in the life of an animal is called diphyodont dentition. The two types of teeth are milk teeth (young ones) and permanent teeth (in adults).
Question 58
How many kinds of teeth are there in mammal?
A
3
B
4
C
6
D
2
Question 58 Explanation: 
In rabbit the teeth are of different types. Hence, the dentition is called heterodont. There are four kinds of teeth in mammals viz. the incisors (I), canines (C), premolars (PM) and molars (M). This is expressed in the form of a dental formula.
Question 59
The gap between the incisors and premolar is called_______
A
Precisors
B
Molars
C
Canines
D
Diastema
Question 59 Explanation: 
Canines are absent in rabbit. The gap between the incisors and premolar is called diastema. It helps in mastication and chewing of food in herbivorous animals.
Question 60
Which of the following statement is correct?
  1. Respiration takes place by a pair of lungs, which are light spongy tissues enclosed in the thoracic cavity
  2. On the lower side of the thoracic cavity is the dome shaped diaphragm.
A
1 alone
B
2 alone
C
1, 2
D
None
Question 60 Explanation: 
Respiration takes place by a pair of lungs, which are light spongy tissues enclosed in the thoracic cavity. The thoracic cavity is bound dorsally by the vertebral column and ventrally by the sternum, laterally by the ribs. On the lower side of the thoracic cavity is the dome shaped diaphragm.
Question 61
Each lung is enclosed by a double membranous_____
A
Alveoli
B
Pleura
C
Neuron
D
None
Question 61 Explanation: 
Each lung is enclosed by a double membranous pleura. Atmospheric air passes through the external nostril and nasal passages into the pharynx.
Question 62
_____ is known as voice box
A
Pharynx
B
Larynx
C
Trachea
D
Buccal cavity
Question 62 Explanation: 
The anterior part of the wind pipe is enlarged to form the larynx or voice box with its wall supported by four cartilaginous plates. Inside the larynx lies the vocal cord and its vibrations result in the production of sound. The larynx leads into trachea or wind pipe.
Question 63
____ prevents the entry of food into the trachea through the glottis
A
Larynx
B
Trachea
C
Bronchi
D
Epiglottis
Question 63 Explanation: 
Tracheal walls are supported by rings of cartilage which help in the free passage of air. The epiglottis prevents the entry of food into the trachea through the glottis.
Question 64
Inspiration is an___ process
A
Active
B
Passive
C
Both a and b
D
None
Question 64 Explanation: 
The respiratory events consist of inspiration (breathing in) and expiration (breathing out) allowing exchange of gases (oxygen and carbon dioxide). Inspiration is an active process while expiration is a passive process.
Question 65
The heart is pear shaped and lies in the thoracic cavity in between_____
A
Kidneys
B
Lungs
C
Pancreas
D
None
Question 65 Explanation: 
The circulatory system is formed of blood, blood vessels and heart. The heart is pear shaped and lies in the thoracic cavity in between the lungs. It is enclosed by pericardium, a double layered membrane.
Question 66
The heart of rabbit is___ chambered
A
Three
B
Four
C
Two
D
Five
Question 66 Explanation: 
The heart of rabbit is four chambered with two auricles and two ventricles. The right and left auricles are separated by inter-auricular septum, similarly right and left ventricles are separated by interventricular septum.
Question 67
The right auricle opens into the right ventricle by right auriculoventricular aperture, guarded by__
A
Bicuspid valve
B
Tricuspid valve
C
Pentacuspid valve
D
Monocuspid valve
Question 67 Explanation: 
The right auricle opens into the right ventricle by right auriculoventricular aperture, guarded by a tricuspid valve. The left auricle opens into the left ventricle by left auriculoventricular aperture guarded by a bicuspid valve or mitral valve.
Question 68
The right auricle receives deoxygenated blood through_____
A
Arteries
B
Veins
C
Both a and b
D
None
Question 68 Explanation: 
The right auricle receives deoxygenated blood through two precaval (superior vena cava) and one post-caval (inferior vena cava) veins from all parts of the body. The left auricle receives oxygenated blood from the pulmonary veins from the lungs.
Question 69
______ carries the deoxygenated blood to the lungs
A
Aorta
B
Pulmonary trunk
C
Superior vena cava
D
Inferior vena cava
Question 69 Explanation: 
From the right ventricle arises pulmonary trunk which carries the deoxygenated blood to the lungs and from the left ventricle arises the systemic arch (aorta) which supplies oxygenated blood to all parts of the body.
Question 70
PNS is formed of____ pairs of cranial nerves
A
37
B
12
C
18
D
24
Question 70 Explanation: 
The nervous system in rabbit is formed of the central nervous system (CNS), peripheral nervous system (PNS) and autonomic nervous system (ANS). CNS consists of brain and spinal cord. PNS is formed of 12 pairs of cranial nerves and 37 pairs of spinal nerves. ANS comprises sympathetic and parasympathetic nerves
Question 71
Brain is situated in the cranial cavity and covered by_____ membranes
A
3
B
5
C
2
D
6
Question 71 Explanation: 
Brain is situated in the cranial cavity and covered by three membranes called an outer duramater, an inner piamater and a middle arachnoid membrane.
Question 72
Match the following
  1. Forebrain               1. rhombencephalon
  2. Midbrain                2. prosencephalon
  3. Hindbrain               3. Mesencephalon
A
2, 3, 1
B
1, 2, 3
C
3, 1, 2
D
1, 3, 2
Question 72 Explanation: 
The brain is divided into forebrain (prosencephalon), midbrain (mesencephalon) and hindbrain (rhombencephalon).
Question 73
______ consists of a pair of olfactory lobes, cerebral hemispheres and diencephalon
A
Forebrain
B
Midbrain
C
Hindbrain
D
All the above
Question 73 Explanation: 
Forebrain consists of a pair of olfactory lobes, cerebral hemispheres and diencephalon. The right and left cerebral hemispheres are connected by transverse band of nerve tissue called corpus callosum.
Question 74
_____ includes the optic lobes.
A
Forebrain
B
Midbrain
C
Hindbrain
D
All the above
Question 74 Explanation: 
The midbrain includes the optic lobes. The hindbrain consists of the cerebellum, pons varolii and medulla oblongata. You will study about the details of mammalian brain in the chapter on nervous system.
Question 75
Each kidney is made of several_____
A
Alveoli
B
Neurons
C
Nephrons
D
None
Question 75 Explanation: 
Each kidney is made of several nephrons. It separates the nitrogenous wastes from blood and excretes it in the form of urea.
Question 76
What is the colour of kidney in rabbit?
A
Red
B
Pale red
C
Dark red
D
Brown
Question 76 Explanation: 
Kidneys in rabbit are dark red, bean shaped organs situated in the abdominal cavity. From each kidney arises the ureters which open posteriorly into the urinary bladder and leads into a thick-walled muscular duct called urethra.
Question 77
Which of the following statement is correct?
  1. Sexual dimorphism is exhibited in rabbits.
  2. The male and female sexes are separate and are morphologically different.
A
1 alone
B
2 alone
C
1, 2
D
None
Question 77 Explanation: 
Sexual dimorphism is exhibited in rabbits. The male and female sexes are separate and are morphologically different.
Question 78
How many accessary glands are there in male rabbit?
A
2
B
4
C
3
D
5
Question 78 Explanation: 
There are three accessory glands in male rabbit namely prostate gland, cowper’s gland and perineal gland. Their secretions are involved in reproduction
Question 79
The anterior part of the oviduct is_____
A
Vestibule
B
Vagina
C
Uterus
D
Vulva
Question 79 Explanation: 
The anterior part of the oviduct is the fallopian tube. It leads into a wider tube called the uterus. The uterus join together to form a median tube called vagina. The common tube is formed by the union of urinary bladder and the vagina and is called the urinogenital canal or vestibule
Question 80
How many pair of accessory glands are there in female rabbit?
A
2
B
5
C
4
D
3
Question 80 Explanation: 
A pair of Cowper’s gland and perineal gland are the accessory glands present in the female reproductive system. The female reproductive system of rabbit consists of a pair of ovaries which are small ovoid structures.
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There are 80 questions to complete.

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