Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : The human population represents the logistic growth curve.
Reason (R) : When the resources are limited leading to competition between individuals and survival of fittest, the population tends to grow in a logistic manner.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Natality rate increases the population size and population density both.
Reason : Natality increases the number of individuals in an area by births.
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Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : The term interbreeding implies sexual reproduction.
Reason (R) : Interbreeding results in variation among species.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : A community with more species is more stable than that with less species.
Reason(R) : More the number of species, lesser the variation in the total biomass production year after year.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Different habitats had different physical and chemical conditions.
Reason (R) : Physicochemical (abiotic) components characterize the habitat of an organism.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Ecology is concerned with four levels of biological organisation.
Reason (R) : Organisms, populations, communities and biomes are four levels of biological organisation.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Small animals are rarely found in polar regions.
Reason (R) : Heat loss or heat gain is a function of surface area. Large surface area, great loss of heat.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Many freshwater animals cannot live for long in sea water.
Reason (R) : Freshwater animals face osmotic problems in sea water.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Population has certain attributes which an individual organism does not have.
Reason (R) : Population is a group of people living in a well defined area, at a particular time.
Directions : In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Clown fish maintains a commensalistic relation with the sea anemone.
Reason (R) : In this interaction, one species benefits and the other is neither harmed nor benefited.