Which one of the following correctly represents an organism and its ecological niche?

  • A
    Vallisneria and pond
  • B
    Desert locust (Schistocerca) and desert
  • C
    Plant lice (aphids) and leaf
  • D
    Vultures and dense forest

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$A$: Aquatic organisms do not experience mechanical shocks while swimming in water.
$R$: Water is a liquid medium for swimming.

Give an example for:
$(a)$ An endothermic animal
$(b)$ An ectothermic animal
$(c)$ An organism of benthic zone

The moving away of an organism temporarily from the stressful habitat to a more hospitable area and return when stressful period is over is called . . . . . . .

In the mountains,there is a lot of moisture and water,and still,the plants are xerophytes,because:

Stenohaline fishes are represented by

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