Which of the following hierarchies is correct with reference to the levels of biological organization?

  • A
    Species $\to$ Communities $\to$ Populations $\to$ Ecosystems $\to$ Landscapes $\to$ Biosphere
  • B
    Species $\to$ Populations $\to$ Communities $\to$ Ecosystems $\to$ Landscapes $\to$ Biosphere
  • C
    Species $\to$ Populations $\to$ Ecosystems $\to$ Landscapes $\to$ Communities $\to$ Biosphere
  • D
    Species $\to$ Population $\to$ Communities $\to$ Landscapes $\to$ Biosphere $\to$ Ecosystems

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Adaptation found in Kangaroo rat is

Give one example for each of the following:
$(i)$ Eurythermal plant species: $................$.
$(ii)$ $A$ hot water spring organism: $................$.
$(iii)$ An organism seen in deep ocean trenches: $................$.
$(iv)$ An organism seen in a compost pit: $................$.
$(v)$ $A$ parasitic angiosperm: $................$.
$(vi)$ $A$ stenothermal plant species: $................$.
$(vii)$ Soil organism: $................$.
$(viii)$ $A$ benthic animal: $................$.
$(ix)$ Antifreeze compound seen in Antarctic fish: $................$.
$(x)$ An organism which can conform: $................$.

If organisms are facing localized stressful conditions in their habitat for a period like winter,then they will . . . . . . to hospitable region.

During adverse seasons,therophytes survive by:

Match the columns:
Column-$I$ Column-$II$
$(a)$ Bears $(i)$ Diapause
$(b)$ Snails $(ii)$ Hibernation
$(c)$ Zooplanktons $(iii)$ Dormancy
$(d)$ Seeds $(iv)$ Aestivation

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