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Biology

Biology
PH of human blood is

7.4
9
6.2
7.5 - 8.0

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Biology
Source of infection in diseases like Tuberculosis, Mumps and Whooping cough is

Carrier organism
Droplets of saliva
Direct contact
A vector

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Biology
Myopia is connected with

None of these
eyes
ears
lungs

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Biology
Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body ?

Subcutaneous fat layer
None of these
Epidermis
Dermis

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Biology
Healing of wounds is dependent upon the ________ division of underlying cells

None of these
Mitotic
Meiosis
Budding

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Biology
Fossils of blue green algae were found in lime stones with the age almost as old as

1.3 Billion years
3.3 Billion years
2.3 Billion years
4.3 Billion years

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