Organization Of Tissues Book Back Questions 9th Science Lesson 18

9th Science Lesson 18

18] Organization Of Tissues

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

In potato, parenchyma vacuoles are filled with starch. In apple, parenchyma stores sugar.

Epithelial tissue in the skin functions as a water-proof membrane.

Sprain is caused by excessive pulling (stretching) of ligaments.

Nerve cells do not undergo cell division due to the absence of centrioles, but they are developed from glial cells by neurogenesis.

Age of our body cells: Cells of the eye lens, nerve cells of cerebral cortex and most muscle cells last a life time but once dead are not replaced. Epithelial cells lining the gut last only about 5 days.

Duration of cell replacement:

Skin cells – about every 2 weeks

Bone cells – about every 10 years

Liver cells – about every 300 – 500 days

Red blood cells last for about 120 days and are replaced.

Choose the best answers:

1. The tissue composed of living thin walled polyhedral cell is

(a) Parenchyma

(b) Pollenchyma

(c) Pclerenchyma

(d) None of above

2. The fibres consists of

(a) Parenchyma

(b) Sclerenchyma

(c) Collenchyma

(d) None of above

3. Companion cells are closely associated with

(a) Sieve elements

(b) Vessel elements

(c) Trichomes

(d) Guard cells

4. Which of the following is a complex tissue?

(a) Parenchyma

(b) Collenchyma

(c) Xylem

(d) Sclerenchyma

5. Aerenchyma is found in

(a) Epiphytes

(b) Hydrophytes

(c) Halophytes

(d) Xerophytes

6. Smooth muscles occur in

(a) Uterus

(b) Artery

(c) Vein

(d) All of the above

7. Nerve cell does not contain

(a) Axon

(b) Nerve endings

(c) Tendons

(d) Dendrites

Match the following:

1. Sclereids – chlorenchyma

2. Chloroplast – sclerenchyma

3. Simple tissue – collenchymas

4. Companion cell – xylem

5. Trachieds – phloem

Fill in the blanks:

1. _______________ tissues provide mechanical support to organs.

2. Parenchyma, collenchymas, Sclerenchyma are _______________ type of tissues.

3. ________________ and ______________ are complex tissues.

4. Epithelial cells with cilia are found in ___________ of our body.

5. Lining of small intestine is made up of _________________.

State true or false. If false, correct the statement:

1. Epithelial tissue is protective tissue in animal body.

2. Bone and cartilage are two types of areolar connective tissues.

3. Parenchyma is a simple tissue.

4. Pholem is made up f tracheids.

5. Vessels are found in collenchymas.

Answers:

Choose the best answers:

1. Parenchyma 2. Sclerenchyma 3. Sieve elements 4. Xylem 5. Hydrophytes 6. Uterus 7. Tendons

Match the following:

1.Sclereids- Sclerenchyma

2.Chloroplast- Chlorenchyma

3.Simple tissue- Collenchyma

4.Companion cell- Phloem

5.Trachieds- xylem

Fill in the blanks:

1. Permanent 2. Simple 3. Xylem, Phloem 4. Trachea of wind pipe 5. Columnar epithelium

State true or false. If false, correct the statement:

1.True

2.False

Correct answer: Bone and cartilage are two types of supportive connective tissues

3.True

4.False

Correct answer: Phloem is a complex tissue: Sieve elements and companion cells

5.False

Correct answer: Vessels are found in xylem