Planktons are organisms which

Float on water surface

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Are free swimmers

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Are deep sea forms

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Are burrowing forms

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Solution

The correct option is A Float on water surface
Plankton are members of kingdom Protista. They passively float on water surface and are called planktons. For example, Chrysophytes.
The free swimming animals are known as pelagic.
Those that reside in the deep are known as benthic.
The burrowing animals are known as fossorial animals such as rabbit.
Thus, the correct answer is option (A).

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Similar questions

62. Which of the following statements are true with respect to marine organisms?

1. Periphytons are the unattached organisms which live at air-water interface

2. Planktons are free floating species with limited powers of locomotion

3.Blue whale is Benthic organism

Options:

Obs. No.	Water sample	Micro-organisms/ water planktons found
1.	Pond water	(i)...................... (ii)...................... (iii) .................
2.	Lake water	(i) ..................... (ii) .................... (iii) ....................
3.	River water	(i) ................... (ii) ................... (iii) ....................

The jaws of the whales are modified into __ to sieve the water and trap minute planktonic organisms.

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