According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health

1.  2.5 or less

2.  1.5 or less

3.  1.0 or less

4.  5.2 or 2.5

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4
Correct Answer :

2.5 or less


Explanation :
No Explanation available for this question

During organ differentiation in Drosophila,an organ is modified to another organ (such as wings may be replaced by legs).Genes responsible for such metamorphosis are called:

1.  double dominant genes

2.  plastid genes

3.  complementary genes

4.  homeotic genes

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4
Correct Answer :

homeotic genes


Explanation :
No Explanation available for this question

One function of telomeres in a chromosome is to:

1.  ‘seal’ the ends of the chromosomes

2.  help two chromatids to move towards poles

3.  starts RNA synthesis

4.  identify the correct member of the homologous pair of chromosome

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4
Correct Answer :

‘seal’ the ends of the chromosomes


Explanation :
No Explanation available for this question

Which one of the following primates is believed to be the closest relative of human beings

1.  Gorilla

2.  Rhesus monkey

3.  Gibbon

4.  Orangutan

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4
Correct Answer :

Gorilla


Explanation :
No Explanation available for this question

The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows: Area and number of habitats Species and their populations (in thousands) in the areas A B C D E F G H I J a(11) 23 1.2 0.52 6.0 — 3.1 1.1 9.0 — 10.3 b(11) 10.2 — 0.62 — 1.5 3.0 — 8.2 1.1 11.2 c(13) 11.3 0.9 0.48 2.4 1.4 4.2 0.8 8.4 2.2 4.1 d(12) 3.2 10.2 11.1 4.8 0.4 3.3 0.8 7.3 11.3 2.1 Which area out of a to d shows maximum species diversity

1.  b

2.  c

3.  d

4.  a

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4
Correct Answer :

d


Explanation :
No Explanation available for this question

The feature closely related with the evolution of humans is:

1.  loss of tail

2.  flat nails

3.  binocular vision

4.  shortening of jaws

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4
Correct Answer :

shortening of jaws


Explanation :
No Explanation available for this question

The function of copper T is to prevent:

1.  fertilisation

2.  egg maturation

3.  ovulation

4.  implantation of blastocyst

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4
Correct Answer :

implantation of blastocyst


Explanation :
No Explanation available for this question

To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong

1.  Cytokine barriers

2.  Cellular barriers

3.  Physiological barriers

4.  Physical barriers

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4
Correct Answer :

Physiological barriers


Explanation :
No Explanation available for this question

Progestrone,which is the most important component of oral contraceptive pills,prevents pregnancy by:

1.  preventing the formation of egg

2.  preventing the clevage of the fertilized egg

3.  creating unfavourable chemical environment for the sperms to survive in the female reproductive tract

4.  blocking ovulation

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4
Correct Answer :

blocking ovulation


Explanation :
No Explanation available for this question

Cleavage in mammalian egg is:

1.  equal holoblastic

2.  unequal holoblastic

3.  superficial meroblastic

4.  discoidal meroblastic

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4
Correct Answer :

unequal holoblastic


Explanation :
No Explanation available for this question
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