MEDIUM
12th CBSE
IMPORTANT
Earn 100

Why integument of an ovule harden and the water content is highly reduced as the seed matures?

Important Questions on Sexual Reproduction in Flowering Plants

MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 10
Why apple and cashew are not called true fruits?
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 11

Draw a labelled diagram of L.S of an embryo of grass (any six labels).

MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 11
Give reason for the anthers of angiospermic flowers are described as dithecous.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 11
Give a reason for the hybrid seeds have to be produced year after year.
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 12

Why is fertilization in an angiosperm referred to as double fertilization? Mention the ploidy of the cells involved?

HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 12
Draw a neat labelled sketch of L.S. of an endospermous monocot seed.
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 13

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.

HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 2 - Sexual Reproduction in Flowering Plants>TEST QUESTIONS>Q 13
Write the changes a fertilized ovule undergoes within the ovary in an angiospermic plant.