MEDIUM
12th CBSE
IMPORTANT
Earn 100

Why are angiosperm anthers called dithecous? Discuss the structure of its microsporangium.

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 11
Why are some seeds referred to as apomictic seeds? Mention one advantage and one disadvantage to a farmer who uses them.
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
Double fertilization is reported in plants of both castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminous. Explain the post-fertilization events that are responsible for it.
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
Describe the development of endosperm after double fertilization in an angiosperm. Why does endosperm development precede that of zygote?
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 14

Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?

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 14
Still, it is observed that exine does not form a continuous layer around the pollen grain. Give reason.
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 14
How are pollen banks useful.
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 15

How does a farmer use the dormancy of seeds to his advantage?

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 15
What advantages a seed provides to a plant?