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 |
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 logistic population growth is expressed by the equation:
1.
2.
3.
4.
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
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
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 (+)