HARD
12th CBSE
IMPORTANT
Earn 100

Draw an L.S of a pistil showing pollen tube entering the embryo sac in angiosperms and label any six parts other than stigma, style and ovary.

Important Questions on Sexual Reproduction in Flowering Plants

HARD
12th CBSE
IMPORTANT
Write the changes a fertilized ovule undergoes within the ovary in an angiospermic plant. 
MEDIUM
12th CBSE
IMPORTANT

Why does endosperm development precede embryo development in angiosperm seeds?  State the role of endosperm in mature albuminous seeds.

HARD
12th CBSE
IMPORTANT
Describe with the help of three labelled diagram the different embryonic stages that include mature embryo of dicot plants.
HARD
12th CBSE
IMPORTANT

A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?

HARD
12th CBSE
IMPORTANT

A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. What would have been the minimum number of ovules present in the ovary?

HARD
12th CBSE
IMPORTANT

A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. How many megaspore mother cells were involved?

HARD
12th CBSE
IMPORTANT

A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. How many male gametes were involved in this case?

HARD
12th CBSE
IMPORTANT

Explain the events after pollination leading to the formation of a seed in angiosperms.