Q. No.
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
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 |
Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as:
| 1. | Character displacement | 2. | Altruism |
| 3. | Resource partitioning | 4. | Competitive exclusion |
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
| 1. | It is necessitated by nature to maintain the ecological balance . |
| 2. | It helps in maintaining species diversity in a community. |
| 3. | It might lead to the extinction of a species. |
| 4. | Both the interacting species are negatively impacted. |
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