Class 12 Biology Zoology | Chapter 1 Reproduction in Organisms | Textbook Evaluation Questions | Zoology Part-1

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Class 12 Biology Zoology | Chapter 1 Reproduction in Organisms | Textbook Evaluation Questions | Zoology Part-1 | 12th Bio Zoology | Chapter 1 | QB 1-4

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1. In which type of parthenogenesis are only males produced ?
a) Arrhenotoky.
b ) Thelytoky.
c) Amphitoky.
d) Both a and b.
Answer : a) Arrhenotoky.

2. The modes of asexual reproduction in bacteria is by.
a) Formation of gametes.
b) Endospore formation.
c) Conjugation.
d) Zoospore formation.
Answer : c) Conjugation.

3. In which mode of reproduction variations are seen .
a) Asexual.
b) Parthenogenesis.
c) Sexual.
d) Both a and b.
Answer : c) Sexual.

4. i
Assertion (A) : In bee society, all the members are diploid except drones.
Reason (R) : Drones are produced by parthenogenesis.
A. If both A and R are true and R is the correct explanation for A.
B. If both A and R are true but R is not the correct explanation for A.
C. If A is true but R is false.
D. If both A and R are false.
Answer : A. If both A and R are true and R is the correct explanation for A.

4. ii
Assertion (A) : Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason (R) : Asexual reproduction involves only mitosis and no meiosis.
A. If both A and R are true and R is the correct explanation for A.
B. If both A and R are true but R is not the correct explanation for A.
C. If A is true but R is false.
D. If both A and R are false.
Answer : A. If both A and R are true and R is the correct explanation for A.

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