Which of the following statements are true for flowers?

(i) Flowers are always bisexual

(ii) They are the sexual reproductive organs

(iii) They are produced in all groups of plants

(iv) After fertilization they give rise to fruits

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

(i) large number of spores

(ii) availability of moisture and nutrients in bread

(iii) presence of tubular branched hypae

(iv) formation of round shaped sporangia

Length of pollen tube depends on the distance between:

Which among the following statements are true for unisexual flowers?

(i) they possess both stamen and pistil

(ii) they possess either stamen or pistil

(iii) they exhibit cross-pollination

(iv) unisexual flowers possessing only stamens cannot produce fruits

Characters transmitted from parents to offspring are present in: