Length of pollen tube depends on the distance between

Vegetative propagation refers to formation of new plants from

Factors responsible for the rapid spread of bread mould on slices of bread are

1. Large number of spores

2. Availability of moisture and nutrients in bread

3. Presence of tubular branched hyphae

4. Formation of round shaped sporangia

Which of the following statements are true for flowers?

1. Flowers are always bisexual

2. They are the sexual reproductive organs

3. They are produced in all groups of plants

4. After fertilisation they give rise to fruits

Which among the following statements are true for unisexual flowers?

1. They possess both stamen and pistil

2. They possess either stamen or pistil

3. They exhibit cross pollination

4. Unisexual flowers possessing only stamens cannot produce fruits