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:
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:
The correct option is B b. 2 only
b)
Neustons: Unattached organisms which live at air-water interface such as floating plants etc.
Periphytons: There are organisms which remain attached to stems and leaves of rooted plants or substances emerging above the bottom mud such as sessile algae.
Planktons: These are free floating species with limited powers of locomotion. This group includes microscopic plants like algaephytoplankton.and animals like crustaceans and protozoans zooplankton..
Nektons: This group includes animals which are swimmers. The animals range in size from the swimming insects to the largest animals, blue whale.
Benthos: These are found living in the bottom of the water mass.
b. 2 only
b)
Neustons: Unattached organisms which live at air-water interface such as floating plants etc.
Periphytons: There are organisms which remain attached to stems and leaves of rooted plants or substances emerging above the bottom mud such as sessile algae.
Planktons: These are free floating species with limited powers of locomotion. This group includes microscopic plants like algaephytoplankton.and animals like crustaceans and protozoans zooplankton..
Nektons: This group includes animals which are swimmers. The animals range in size from the swimming insects to the largest animals, blue whale.
Benthos: These are found living in the bottom of the water mass.
