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Question 1 of 15
1. Question
Which of the following is correct for r-selected species?
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Question 2 of 15
2. Question
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Question 3 of 15
3. Question
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Question 4 of 15
4. Question
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Question 5 of 15
5. Question
Which one of the following is categorised as a parasite in true sense?
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Question 6 of 15
6. Question
The salinity in sea water in parts per thousand (ppt) ranges between
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Question 7 of 15
7. Question
A population of 500 that experiences 55 births and 5 deaths during a one-year period. What is the reproductive rate for the population during the one-year period ?
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Question 8 of 15
8. Question
Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
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Question 9 of 15
9. Question
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Question 10 of 15
10. Question
Plants which produce characteristic pneumatophores and show vivipary belong to
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Question 11 of 15
11. Question
If N is the population density at time t, then its density at time t + 1 is
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Question 12 of 15
12. Question
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Question 13 of 15
13. Question
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Question 14 of 15
14. Question
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Question 15 of 15
15. Question
Read the following statements and choose the correct option.
(i)Light is essential for life to exist on the earth.
(ii)Many species of small plants under the canopy to tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids.
(iii)UV rays are not harmful to many organisms.
(iv)Photoperiodic requirement is essential for many plants for flowering.
(v)Red algae can live in deeper water of sea because of having pigment, phycoerythrin.
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