Q. No.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
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
Shade tolerant plants are called as _________ and sun adapted plants are_______________.
(1) Heliophytes, Sciophytes
(2) Sciophytes, Heliophytes
(3) Eurythermals, Stenothemnals
(4) Stenothermals, Eurythermals
Permafrost is a characteristic of __________ biome.
(1) Taiga
(2) Tundra
(3) Savanna
(4) Deserts
Mammals from colder climates have shorter appendages. This is:
(1) Bergman's rule
(2) Allen's rule
(3) Gauss law
(4) Chargaff rules
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
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 |
Between which of the following, the relationship is not an example of commensalism?
1. Orchid and the tree on which it grows
2. Cattle Egret and grazing cattle
3. Sea Anemone and Clownfish
4. Female wasp and fig species
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