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Guess Paper – 2012Class – X

Subject – Biology

(HOW DO ORGANISMS REPRODUCE)

Instructions: 10th Science

All the questions are compulsory. Time : 1 Hr Attempt all the questions in order. M. marks : 25

-------------------------Section-A------------------------- Q. 1.CHOOSE THE CORRECT OPTION (MCQs) _________ (1) each

i) Genetic Material Is

a) RNA b) DNA c) ATP d) NADP

ii) Regeneration Takes Place In

a) Earthworm b) Hydra c) Amoeba d) Planaria

iii) Future Shoot Originate From

a) Plumule b) Radicle c) Seed Leaf d) Seed Coat

iv) Contraceptive Devices Which Acts By Changing Hormonal Change

a) Condoms b) Copper-T c) Pills d) Surgical Method

v) Weeping Of Uterus Is

a) Menstruation b) Periods c) Both d) None

Q. 2. DEFINE THE FOLLOWING. _________ (1) each

i) Fragmentation

ii) Budding

iii) Endospore

iv) Thalamus

v) Pollination

-------------------------Section-B-------------------------

Q. 3. ANSWER THE FOLLOWING. _________ (2) each

i) What is double fertilization? Write its significance.

ii) Draw a well labeled diagram of flower showing its vertical section.

Q. 4 GIVE SOLUTIONS FOR THE FOLLOWING. _________ (3) each

i) Define fission. How binary and multiple fission differs?www.cbseguess.com

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ii) What is variation? Discuss its importance.

-------------------------Section-C-------------------------

Q. 5. i) What is reproduction? How do complex organisms reproduce?

ii) Write advantages of sexual reproduction over asexual reproduction.

iii) Expand the following a) AIDS B) HIV C) STDs d) NADP _________ (2+2+1=5)

PREPARED BY: RAJENDER SINGH (M.PHILL. B.ED.) 98572-51035, 9418477935

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