APSC Zoology MCQs with Answers | Zoology Questions for PSC Exams

61 Archenteron is formed during

1 morula stage

2 blastula stage

3 late gastrula stage

4 early gastrula stage

View Answer

Answer: early gastrula stage

62 Turner's syndrome is caused due to sex chromosomal composition of

1 XO

2 XXY

3 XXX

4 XYY

View Answer

Answer: XO

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63 Darwin's finches are a good example of

1 convergent evolution

2 industrial melanism

3 connecting link

4 adaptive radiation

View Answer

Answer: adaptive radiation

64 Which of the following is secondary pollutant?

1 NO

2 NO2

3 SO2

4 PAN

View Answer

Answer: PAN

65 A taxon which is facing an extremely high risk of extinction in the wild in immediate future is known as

1 rare

2 vulnerable

3 endangered

4 critically endangered

View Answer

Answer: critically endangered

66 In a mammalian embryo, the extra-embryonic membranes arise from

1 inner cell mass

2 formative cells

3 trophoblast

4 follicle cells

View Answer

Answer: trophoblast

67 Removal of spleen from the human body leads to

1 decrease in antibody formation

2 increase in RBC production

3 decrease in platelet formation

4 decrease in plasma formation

View Answer

Answer: decrease in antibody formation

68 Which one of the following elements is required in coagulation of blood?

1 Calcium

2 Iron

3 Potassium

4 Sodium

View Answer

Answer: Calcium

69 The conduction of impulse from SA node moves to

1 A

2 B

3 AB

4 O

View Answer

Answer: AB

70 Seymouria, a fossil reptile, is a missing link between

1 fishes and amphibians

2 amphibians and reptiles

3 reptiles and mammals

4 None of the above

View Answer

Answer: amphibians and reptiles

71 The Wild Life (Protection) Act was passed in the year

1 1972

2 1982

3 1992

4 1962

View Answer

Answer: 1972

72 In ornithine cycle, which pair of the following wastes are removed from the blood?

1 C02 and urea

2 Ammonia and urea

3 C02 and ammonia

4 Urea and sodium salt

View Answer

Answer: C02 and urea , C02 and ammonia

73 The honeybees exhibit a particular dance to communicate the location of food. This is known as

1 tap dance

2 waggle dance

3 break dance

4 round and waggle dance

View Answer

Answer: round and waggle dance

74 Who stated that life originated from simple amino acids?

1 Oparin

2 Muller

3 Urey and Muller

4 De Vries

View Answer

Answer: Urey and Muller

75 Which of the following is used for dating the bones?

1 C14

2 I121

3 P32

4 All of the above

View Answer

Answer: C14

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