Choose correct sentence.
Choose correct sentence.
- A
Except for the deep sea hydro - thermal ecosystem, sun is the only source of energy for all ecosystems on earth of the incident solar radiation more than 50 percent of it is photo synthetically active radiation (PAR).
- B
Plant capture only $10-20$ percent of the PAR and this small amount of energy sustains the entire living world.
- C
All organisms are dependent for their food on producers.
- D
Primary producers in an aquatic ecosystem are zooplanktons.
Similar Questions
Which one of the following is a correct food chain
Which one of the following is a correct food chain
In an ecosystem, the population of
In an ecosystem, the population of
- [AIPMT 1988]
Distinguish between
$(a)$ Grazing food chain and detritus food chain
$(b)$ Production and decomposition
Distinguish between
$(a)$ Grazing food chain and detritus food chain
$(b)$ Production and decomposition
Plants capture only.................percent of $PAR$
Plants capture only.................percent of $PAR$
Choose correct answer.
$(1)$ Zooplanktons are primary producers in an aquatic ecosystem.
$(2)$ Decomposition is largely an oxygen requiring process.
$(3)$ In a natural ecosystem, fishes, wolf, etc. are carnivore.
$(4)$ The amount of energy decreases in each successive trophic level.
Choose correct answer.
$(1)$ Zooplanktons are primary producers in an aquatic ecosystem.
$(2)$ Decomposition is largely an oxygen requiring process.
$(3)$ In a natural ecosystem, fishes, wolf, etc. are carnivore.
$(4)$ The amount of energy decreases in each successive trophic level.