During adverse seasons,therophytes survive by:

Annual migration does not occur in the case of ............ .

Habitat together with the functions of a species constitutes its

Which of the following are examples of short-term adaptation?
$(1)$ Accumulation of melanin in the skin
$(2)$ Utilization of stored fat by animals during hibernation
$(3)$ Seed dormancy
$(4)$ Phototropism of stems and geotropism of roots

Adaptations of organisms can be related to which of the following?

Give scientific reasons: Freshwater animals cannot survive for long in seawater.