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
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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
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Answer: adaptive radiation
64
Which of the following is secondary pollutant?
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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
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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
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69
The conduction of impulse from SA node moves to
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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
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Answer: amphibians and reptiles
71
The Wild Life (Protection) Act was passed in the year
1
1972
2
1982
3
1992
4
1962
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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
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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
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75
Which of the following is used for dating the bones?
1
C14
2
I121
3
P32
4
All of the above
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