Pollen grains are shed at which stage?

(1) 2 celled 

(2) 3 celled

(3) Usually at 2-celled, but sometimes 3-celled

(4) Single celled stage

Which of these is a diploid structure ?

(1) Pollen grains

(2) Egg

(3) Megaspore

(4) MMC

False fruit in an apple is formed from

(1) receptacle

(2) thalamus

(3) peduncle

(4) petals.

Cross pollination in true genetic sense is 

(1) allogamy

(2) cleistogamy

(3) geitonogamy

(4) autogamy

Seed of castor is

(1) non-endospermic, exalbuminous

(2) endospermic albuminous

(3) endospermic exalbuminous

(4) non-endospermic albuminous.

Ubisch bodies are secreted from

(1) ovule

(2) tapetum

(3) both of these

(4) none of these

Aleurone layer is

(1) haploid

(2) diploid

(3) triploid

(4) tetraploid

Edible part of apple is the

(1) thalamus

(2) mesocarp

(3) epicarp

(4) endocarp

Pollination by bat is called

(1) ornithophily

(2) chitopteriphily

(3) malacophily

(4) anemophily

During formation of which of the following free nuclear division occurs?

(1) Flower

(2) Endosperm

(3) Gametes

(4) Fruit