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
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
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
The process of growth is maximum during:
1. Lag phase
2. Senescence
3. Dormancy
4. Log phase
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
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. |