Pyramid of Energy in Aquatic Ecosystems

Q. Regarding assertion and reason, choose the correct statement
Assertion [A]: Marine ecosystems have lesser trophic levels than terrestrial ecosystems.
Reason [R]: Most of the phytoplankton is available for consumption and assimilation by primary consumers in aquatic ecosystems.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. A is true and R is false
4. A is false and R is true
5. Both A and R are false

Q. Choose the correct option with respect to statements X and Y.

X: Marine ecosystems have lesser trophic levels than terrestrial ecosystems.

Y: Most of the phytoplankton is available for consumption and assimilation by primary consumers in aquatic ecosystems.

1. Both X and Y are true
2. Both X and Y are false
3. X is true and Y is false
4. X is false and Y is true

Q. Which of the following statement is incorrect regarding ecological pyramids?

1. The pyramid of numbers is upright in a grassland ecosystem.
2. The pyramid of biomass is upright in a grassland ecosystem.
3. The pyramid of energy is inverted in ocean ecosystem.
4. The pyramid of biomass is inverted in aquatic ecosystem.