Organisms and Populations Test - 2

Water that exists between soil particles in small capillary pores is called capillary water. This water is available to plants and readily absorbed by them.

The maximum birth rate that a species can achieve under ideal environmental conditions is potential natality. It is the upper limit to biotic potential in the absence of mortality

Lag phase in a J-shaped curve is a period of adaptation of animals to new environment, so it is characterised by slow or no growth in population.

According to Verhulst-Pearl logistic growth, a population grows in a habitat which has limited resources. In exponential or geometric growth curve, population grows in a habitat having unlimited resources.

This is an incorrect pair. Pelagic fishes produce small sized but large number of offspring.

This is the correct answer as both statements b and c are true.

Carrying capacity of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, given that it has all it needs for survival.

Stenothermal organisms can tolerate and thrive in a narrow range of temperature.

A is true but R is false. Small animals lose their body heat very fast but they do not have a small surface/volume ratio. In fact, small animals have large surface/volume ratio.

Seeds go into a dormant state to cope with stressful conditions. They germinate under favourable conditions.
Bears undergo hibernation to cope with extreme cold conditions.
Snails undergo aestivation to avoid summer related problems.
Zooplanktons enter diapause, a state of suspended development.