Question

Consider the following pairs of the aquatic organisms and their features:

1. Periphyton: Attached to roots
2. Plankton: Limited locomotory powers
3. Benthos: Lives in the bottom of the water mass


Which of the above pairs is/are correctly matched?

(a) 3 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1 and 2 only​

Answer 1

Option B - 2 and 3 only

More Information

☆ Aquatic Organisms :-

• Periphyton :- These are organisms that remain attached to stems and leaves of rooted plants or substances emerging above the bottom mud such as sessile algae and their associated group of animals.

• Plankton :- This group includes both microscopic plants like algae (phytoplankton) and animals like crustaceans and protozoans (zooplankton) found in all aquatic ecosystems, except certain swift-moving waters. The locomotory power of the planktons is limited so that their distribution is controlled, largely, by currents in the aquatic ecosystems.

• Benthos :- The benthic organisms are those found living at the bottom of the water mass. Practically every aquatic ecosystem contains well-developed benthos.

_________

Answer 2

I think answer is option B