Sexual Reproduction in Flowering Plants

Q.

Describe The Changes That Occur In A Flower After Fertilization.

Q.

The group of petals is called

1. sepals

2. calyx

3. root

4. none of these

Q.

How does the male gamete reach the egg cell?

1. The male gametes travel in the pollen tube, which reaches the egg cell in the ovule.
2. The male gametes come through the corolla and reach the egg cell in the ovule.
3. The male gametes are directly transferred by pollinating agents to the egg cell in the ovule
4. .All of these

Q.

Cotyledons of seeds are units to store ________.

1. water

2. reserve food

3. pollen

4. growth hormones

Q.

Given ahead is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the questions that follow :
(a) Name the parts labelled 1, 2, 3, 4, and 5
(b) Where does the germination of the pollen grain takes place and how ?

(c) What is the function of the part labeller `4' ?
(d) What happens to the part labelled '5' during the process ?

Q. What are the fates of the zygote and the endosperm nucleus?

1. The zygote becomes the fruit, the endosperm nucleus becomes the seed
2. The zygote becomes the embryo, the endosperm nucleus becomes the endosperm
3. The zygote becomes the endosperm, the endosperm nucleus becomes the embryo
4. The zygote becomes the seed, the endosperm nucleus becomes the fruit

Q.

Each member of the gynoecium is called a ___________.

Q.

Which is not a part of carpel?

1. Stigma

2. Ovary

3. Anther

4. Style

Q.

Stigma stores the pollen grains.

1. True
2. False

Q.

In the pollination process, …………………. are carried by the pollinating agents

1. anthers

2. pollen grains

3. ovules

4. stigma

Q.

CHAPTER POLLINATION AND FERTILIZATION

what is germ pore

Q.

Pollen grains are produced in ___.

Q. Mention if the following statements are true(T) or false(F)
(ii) A flower typically has six floral whorls.

Q. Match the parts in Column A with the flowers or parts of the flower in Column B

Column A			Column B
Polyadelphous	1	a	Polypetalous
Pollen grains	2	b	Calyx , corolla
Free petals	3	c	Nectar
Non-essential	4	d	Bombax
Sweet fragrant fluid	5	e	Pollen sac

Q.

Match the following parts of a flower with their post-fertilisation changes

1. 1-b , 2-a , 3-c

2. 1-c , 2-b , 3-a

3. 1-c , 2-a , 3-b

4. 1-b , 2-c , 3-a

Q.

Vegetative propagation in plants is a type of asexual reproduction because:

1. Only mitotic cell division taken place.

2. No fusion of gametes taken place.

3. No genetic recombination takes place.

4. All of the above.

Q.

Assertion :Pistil of a flower is composed of carpel.

Reason :Only one carpel makes a pistil in a flower.

1. A and R both are true.

2. A is true, R is false.

3. A is false, R is true.

4. A and R both are false.

Q. In bud pollination anthers and stigma ripe before the opening of the buds, hence self-pollination takes place, e.g. pea, wheat, rice, etc. What are the advantages of autogamy?

Q. Flowers of Ophrys resembles female wasp Colpa and are pollinated by the male wasp. The flowers show mimicry

1. Warning type protective
2. Concealing type protective
3. Alluring type aggressive
4. Concealing type aggressive mimicry

Q.

The male gamete in a flower is transferred by __.

Q. An orchid resembling the female of an insect, so as to be able to get pollinated is due to phenomenon of

1. Pseudoparthenocarpy
   
2. Both A and B
3. Mimicry
4. Pseudocopulation

Q.

what is the role of primitive nucleus present in pollen grains in pollination and fertilization?

Q. Future shoot hidden in a seed is called as

1. Flower
2. Seed
3. Root
4. Plumule

Q.

After__ (pollination/ fertilization) floral parts dry and fall off while the ovary enlarges to form fruit with ovules becoming seeds.

Q. Match the following.
$\begin{array}{cccc}A.& \text{Anemophily}& 1.& \text{Pollination by birds}\\ B.& \text{Ornithophily}& 2.& \text{Pollination by insects}\\ C.& \text{Entomophily}& 3.& \text{Pollination by water}\\ D.& \text{Hydrophily}& 4.& \text{Pollination by wind}\end{array}$

1. A – 3, B – 2, C – 1, D – 4
2. A – 1, B – 2, C – 3, D – 4
3. A – 4, B – 2, C – 1, D – 3
4. A – 4, B – 1, C – 2, D – 3

Q.

how does fertilization takes place in flowers

Q.

is there ensurity of fertilization in advantages of self pollination

Q.

What does the following picture represent?

1. Self pollination

2. Cross pollination

3. Fertilisation

4. Both A and B

Q. Label the different parts of the pistil.