Q. No.Consider the following water conservation mechanisms
A. Nasal countercurrent mechanism
B. Dependence on metabolic water
C. Highly hypertonic urine
D. Living one more on protein rich diet
The kangaroo rat living in desert can survive without drinking water because of
1. A, B & C
2. A, B & D
3. B, C & D
4. A, C & D
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
1. Growth response
2. Defence action
3. Effect on reproduction
4. Nutritive value
Match the items in Column-I with those in Column-II:
| Column-I | Column-II | ||
| (a) | Herbivores-Plants | (i) | Commensalism |
| (b) | Mycorrhiza-Plants | (ii) | Mutualism |
| (c) | Sheep-Cattle | (iii) | Predation |
| (d) | Orchid-Tree | (iv) | Competition |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iv) | (ii) | (i) | (iii) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (ii) | (i) | (iii) | (iv) |
| 4. | (i) | (iii) | (iv) | (ii) |
The impact of immigration on population density is:
| 1. | Negative |
| 2. | Both positive and negative |
| 3. | Neutralized by natality |
| 4. | Positive |
Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?
| 1. | Mutualism | 2. | Predation |
| 3. | Resource partitioning | 4. | Competitive release |
Amensalism can be represented as:
1. Species A (–) : Species B (–)
2. Species A (+) : Species B (0)
3. Species A (–) : Species B (0)
4. Species A (+) : Species B (+)
In the exponential growth equation Nt =N0ert, e represents :
1. The base of natural logarithms
2. The base of geometric logarithms
3. The base of number logarithms
4. The base of exponential logarithms
Match List-I with List-II
| List-I | List-II |
| (a) Allen's Rule | (i) Kangaroo rat |
| (b) Physiological adaptation | (ii) Desert lizard |
| (c) Behavioural adaptation | (iii) Marine fish at depth |
| (d) Biochemical adaptation | (iv) Polar seal |
Choose the correct answer from the options given below :
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (i) | (ii) | (iii) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (iv) | (ii) | (iii) | (i) |
| 4. | (iv) | (i) | (iii) | (ii) |
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