Q. No.The population with the following age pyramid:
1. Will grow exponentially in near future
2. Will grow steadily in the future
3. Is likely to remain stable in future
4. Is likely to decline in future
Triangular age pyramid represents
1. Expanding population.
2. Declining population.
3. Mature population.
4. Both 1. and 3.
Choose the incorrect match regarding population interactions.
Species A Species B
1. Amensalism – –
2. Parasitism + –
3. Commensalism + 0
4. Mutualism + +
Consider the following statements:
| I: | When certain exotic species are introduced into a geographical area, they become invasive because the invaded land does not have its natural predators. |
| II: | Competition is best defined as a process in which the fitness of one species is significantly lower in the presence of another species. |
| III: | Biological control methods adopted in agricultural pest control are based on the ability of the predator to regulate the prey population. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Population density will increase if
1. Number of births and number of deaths increase.
2. Number of births and number of immigrants is high.
3. Number of immigrants and number of deaths is high.
4. Number of births and number of immigrants is low.
Statement - 1 : Herbivores and plants appears to be more adversely affected by competition than carnivores.
Statement - 2 : Competition is a process in which fitness of one species is significantly lower in the presence of another species.
Options
1. Both statements are correct.
2. Both statements are incorrect.
3. 1 is incorrect.
4. 2 is incorrect.
“Sexual deceit” is employed by
1. Ophrys to get pollinated.
2. Orchids on mango for shelter.
3. Cuckoo on crow.
4. Abingdon torgoise in Galapagos island.
Which of the following factors increases population density more significantly if new habitat is colonized?
1. Natality
2. Mortality
3. Immigration
4. Emigration
Gause's Competitive Exclusion Principle is challenged by
1. Competitive release
2. Resource Partitioning
3. Mutual exclusion
4. Predation
The Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced on the island apparently due to
1. Superiority of goats
2. Greater browsing efficiency of goats
3. Higher value
4. Competitive release
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