Explain what do you understand by sexual reproduction?

3

(a)

State the main differences between asexual and sexual reproduction.

3

(a)

How does the process of fertilisation take place in flowers?

3

(a)

Collect some flower of different plants like papaya, rose, mustard, lady's finger, Petunia, cucumber, corn, pea, etc. Group them under following heads.
(a) Which of these plants have unisexual flowers?
(b) Which of these plants have bisexual flower?
(c) What is the other name of unisexual and bisexual flower?

3

(a)

What is a bud? Which organism reproduces by budding? Given the diagrammatic representation of budding in a plant.

3

(a)

How do the plants like sugarcane, potato and rose reproduce when they cannot produce seeds?

3

(a)

One morning as Paheli strolled in her garden she noticed many small plants, which were not there a week ago. She wondered, where they had come from as nobody had planted them there. Explain the reason for the growth of these plants.

3

(a)

Why is vegetative propagation a preferred method of asexual reproduction?

3

(a)

Insects are called agents of pollination. How do they aid in process of pollination?

3

(a)

What is seed dispersal? What will happen if all the seeds of a plant were to fall at a same place and grow?

3

(a)

Sketch the reproductive parts of a flower.

3

(a)

Describe the various ways by which the seeds are dispersed.

3

(a)

Describe the events taking place in a flower after pollination till fertilization.

3

(a)

Draw a diagram of pistil to show pollen grain, pollen tube, ovary and ovule.

3

(a)

In the diagram, label the parts marked (a), (b) and (c).

3

(a)