Acid rain is mainly a by-product of a variety of human activities that emit the oxides of

a) Sulphur and nitrogen in the atmosphere
b) Mercury and lead compounds in water bodies
c) Radioactive compounds in effluent discharge
d) Carbon emitted by peat lands

Which of the following National parks are part of Nilgiri Biosphere Reserve?

1. Mukurthi National Park
2. Bandipur National Park
3. Silent Valley National Park
4. Eravikulam National Park

Select the correct answer code:

a) 1, 2, 3
b) 1, 3, 4
c) 1, 2, 4
d) 1, 2, 3, 4

Photoperiodism is a phenomenon related to

a) Mode of photosynthesis in plants
b) Flowering in plants
c) Both a and b
d) Neither a nor b

The phenomenon of increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain is known as:

a) Biosparging
b) Biodilution
c) Biomagnification
d) Bioaccumulation

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b) Corals-Spiders-Snakes-Horses

c) Spiders-Snakes-Corals-Horses

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With reference to Vedic age, consider the following statements:

1. The earliest references to iron in the Indian subcontinent are found in early Vedic literature.
2. Chaturashrama stages were applicable to all varnas except women.

Which of the above statement(s) is/are incorrect?

a) 1 only

b) 2 only

c) Both 1 and 2

d) Neither 1 nor 2

Consider the following statements regarding 'Gahapati'

1. The term denoted the owner and head of the household
2. He was the owner of the resources that belonged to the household.

Which of the above statement(s) is/are correct?

a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2

Consider the followings:
1. Amazonite
2. Gold
3. Teak
4. Lapis Lazuli
Which of the above item/s was/were imported by Harappan people?

a) 1, 3 and 4 only
b) 1 and 3 only
c) 2 and 4 only
d) All of these