Sexual Reproduction in Flowering Plants

Q.

Which one is the most dominant pollinating agent?

Q.

Which of the following produces male gametes in a flower?

1. Sepals

2. Petals

3. Carpels

4. Stamens

Q.

What is major function of cotyledons in a seed ?

1. Both B and C

2. Protect the embryo.

3. Provide nutrition to young plant.

4. Protect the fruit from decay.

Q.

Which part of the flower contains the egg cell?

1. Ovary

2. Ovule

3. Embryo sac

4. stigma

Q.

Why (and how) does the male gamete cell fuses with the female gamete cell of a plant?

Is it because of the reason that both of the gametes have different charges and hence attract each other or is it like that they form a (Chemistry) bond?

Q.

Pollination between flowers of different plants of same species is called_____

Q.

Difference between:

Seed coat and Embryo

Q. Which of the following is an incorrect match?

1. Gynoecium - Ovary
2. Stamen - Anther
3. Gynoecium - Style
4. Androecium - Ovule

Q.

Which of the following is an advantage of cross-pollination in angiosperms?

1. more flower production

2. more variations in progeny

3. more seed production

4. all of the above.

Q.

Point out two characteristics of insect pollinated flowers.

Q.

Is autogamy seen in maize?

Q.

Match the following.
$\begin{array}{cc}\text{A}& \text{B}\\ \text{(1) Androecium}& \text{(a) Whorl of sepals}\\ \text{(2)Gynoecium}& \text{(b) Whorl of petals}\\ \text{(3) Corolla}& \text{(c) Whorl of stamens}\\ \text{(4) Calyx}& \text{(d) Whorl of pistil/carpel}\end{array}$

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

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

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

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

Q. Label the different parts of the pistil.

Q. Explain the structure of flower with a neat a labelled diagram. (5 Marks)

Q.

Define germination of a seed.

Q.

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

1. All of the above.

2. Only mitotic cell division taken place.

3. No fusion of gametes taken place.

4. No genetic recombination takes place.

Q. Cross-pollination happens between the flowers of:

1. the same plant
2. different plants of the same species
3. different plants of the same or different species
4. different plants of different species

Q.

What is the transfer of pollen grains from the anther of a stamen to the stigma of the pistil called ?

Q.

Define the following.

Seed Germination

Q. What is the point of contact of a pollen grain to grow into a pollen tube?

1. Style
2. Ovule
3. Stigma
4. Corolla