Reproduction And Modification In Plants Book Back Questions 7th Science Lesson 5

7th Science Lesson 5

5] Reproduction And Modification In Plants

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

The sunflower is not a single flower. It is a group of flowers clustered together. A group of flowers arranged together is called inflorescence. Tridax procumbens, looks like a single flower, but is an inflorescence. Leaf juice of this plant is used to cure wounds and cuts.

The world’s largest and heaviest seed is the double coconut. The seed looks like two coconut fused together. It only grows in two islands of the Seychelles. A single seed may be 12 inches long, nearly 3 feet in circumference and weighs about 18 kg. Orchids have the smallest seeds in the plant kingdom. 35 million seeds may weight only about 25 gram.

Vanda is an epiphytic plant, which grows on trees. The velamen tissue present in the epiphytic root, absorbs moisture, to perform photosynthesis.

A root growing from a location other than the underground, such as from a stem or leaf is called as adventitious root.

Choose the best answers:

1. Vegetative propagation by leaves takes place in

(a) Bryophyllum

(b) Fungi

(c) Virus

(d) Bacteria

2. Asexual reproduction in yeast is

(a) Spore formation

(b) Fragmentation

(c) Pollination

(d) Budding

3. Reproductive part of a plant is

(a) Root

(b) Stem

(c) Leaf

(d) Flower

4. Pollinators are

(a) Wind

(b) Water

(c) Insect

(d) All the above

5. Climbing roots are seen in

(a) Betel

(b) Black pepper

(c) Both of them

(d) None of them

Fill in the blanks:

1. The male reproductive part of a flower is _______________

2. _____________ is the basal swollen part of the Gynoecium.

3. After fertilization the ovule becomes ________________

4. Breathing roots are seen in ___________ plants.

5. Onion and Garlic are example of ________________

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

1. A complete flower has four whorls.

2. The transfer of pollen to the stigma is known as pollination.

3. Conical shaped root is carrot.

4. Ginger is an underground root.

5. Leaves of Aloe Vera are fleshy and store water.

Match the following:

1. Petal – Opuntia

2. Fern – Chrysanthemum

3. Phylloclade – Attracts insect

4. Hooks – Spore

5. Sucker – Bignonia

Answers:

Choose the best answers:

1. Bryophyllum 2. Budding 3. Flower 4. Wind, Water and Insects 5. Betel and Black pepper

Fill in the blanks:

1. Androecium 2. Ovary 3. Seed 4. Avicennia 5. Bulb

State True or False:

1. True

2. True

3. True

4. False

Correct Statement: Ginger is an underground modified stem which has nodes and internodes.

5. True

Match the following:

1. Attracts insects 2. Spore 3. Opuntia 4. Bignonia 5. Chrysanthemum