Two different species cannot live for a long duration in the same niche or habitat. This is:
1. Allen's law
2. Gloger's rule
3. Competitive exclusion principle
4. Weismann's theory
Which of the following is a correct pair:
1. Cuscuta – parasite
2. Dischidia – insectivorous
3. Opuntia – predator
4. Capsella – hydrophyte
Mycorrhiza is an example of:
1. Symbiotic relationship
2. Ectoparasitism
3. Endoparasitism
4. Decomposers
A male insect mistakes an orchid flower to be female due to its shape and performs the act of copulation and induces pollination. This is an example of:
1. Mimicry
2. Pseudocopulation
3. Pseudopollination
4. None
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
The logistic population growth is expressed by the equation:
1.
2.
3.
4.
Which one of the following is most appropriately defined:
1. | Amensalism is a relationship in which one species is benefited whereas the other is unaffected |
2. | Predator is an organism that catches and kills other organism for food. |
3. | Parasite is an organism which always lives inside the body of another organism and may kill it. |
4. | Host is an organism which provides food to another organism. |
The impact of immigration on population density is:
1. | Negative |
2. | Both positive and negative |
3. | Neutralized by natality |
4. | Positive |