VELAMMAL VIDHYASHRAM
COMPETENCY BASED QUESTIONS
GRADE X – BIOLOGY
REPRODUCTION
Q. No Question Marks
Multiple Choice Question
Q.1 Contraceptives help in preventing pregnancies. 1
What function would a contraceptive loop inserted at T serve?
A. Stopping sperms from reaching and fertilizing eggs
B. Stopping release of sperms
C. Blocking the release of eggs
D. Stopping egg creation
Free Response Question/ Subjective Question
Q.2 Bindu wants to produce a hybrid variety of tomatoes. She has tomato plants X 1
and Y belonging to two different varieties, one with smooth, long fruits and the
other one with wrinkled, round fruits.
Tomatoes have bisexual flowers. Bindu carries out the following steps carefully
to cross pollinate the flowers of plants X and Y:
1. She removes a part of the flowers of tomato plant X just before the flowers
bloom.
2. She manually pollinates the flowers of tomato plant X using pollen from the
flowers of tomato plant Y.
3. She ties small plastic bags around the pollinated flowers of tomato plant X.
The plastic bags are removed after a couple of days.
What could be reason for covering the pollinated flowers of plant X?
Q.3 Water hyacinths reproduce both sexually and asexually. They reproduce 4
sexually by producing seeds through flowers, and asexually by bud formation
or fragmentation. It undergoes reproduction through either of the methods
depending on environmental conditions. Water hyacinths bloom freely in
water-rich conditions whereas, reproduction for survival is more effort-
intensive in water-scarce conditions.
(a) Explain why this variation in reproduction is required in water hyacinths.
(b) Which mode of reproduction is likely to occur in the following conditions?
Justify:
(i) abundance of water (ii) scarcity of water
Q.4 Compare the reproductive parts of flowers and humans and answer the 3
questions below:
(a) Which part of the human female reproductive system has a similar function
as the stigma in a flower? Give a reason to support your answer.
(b) Testes in the male reproductive system would correspond to which part of
the male reproductive system in a flower? Justify.
(c) The style of a flower and the fallopian tube in humans correspond
functionally with each other. Is this statement true? Justify your answer.
