Organisms and Populations — BIOLOGY STD 12 Science — Question

Migration- The organisms (animals) can move away temporarily from stressful habitat to a more hospitable area and return when stressful period is over.
e.g. humans moving from Delhi to Shimla during summer/many animals or birds undertake long distance migration to hospitable area.
Spore formation– various kind of thick walled spores are formed which germinate on availability of suitable enviornment.
e.g. bacteria/fungi/lower plants.
Dormancy– seeds or vegetative reproductive structures help to tide over stress by reducing their metabolic activity.
e.g seeds or vegetative reproductive structures of higher plants.
Hibernation– It takes place during winter.
e.g bears or any other correct relevant example.
Aestivation– It takes place during summer to avoid heat and dessication. (in animals)
e.g snails/fish or any other correct relevant example.
Diapause- under unfavourable conditions zooplanktons enter a stage of suspended metabolic activity.
e.g zooplankton.