Which of the following statements are correct?

(A) Certain mass of living material at each trophic level is called as standing crop.

(B) The crop that can withstand adverse conditions is called standing crop

(C) The amount of nutrients in soil is called Biomass

(D) Only Biotic components make an Ecosystem

(E) Most of Phytoplanktons are member of algae

Choose the correct answer from the options given below:

Key Points

• Statement (A) - CORRECT
  • Standing crop refers to the mass of living material at each trophic level at a particular time.
  • It is measured as the biomass or number of organisms in that area.
• Statement (B) - INCORRECT
  • As discussed above, standing crop denotes the mass of living material and NOT any particular crop.
• Statement (C) - INCORRECT
  • The amount of nutrients present in the soil at any given time in known as the standing state.
  • The nutrients include carbon, nitrogen, phosphorus, calcium, etc.
  • On the other hand, biomass denotes the organic matter that constitutes living organisms.
• Statement (D) - INCORRECT
  • The ecosystem is defined as a functional unit of nature, that consists of both biotic and abiotic components.
  • The organisms interact among themselves as well as with the physical environment.
  • The flow of energy leads to clearly defined trophic structures, biodiversity and nutrient cycles.
• Statement (E) - CORRECT
  • Planktons are the diverse collection of microorganisms found in water.
  • They are usually classified as Phytoplanktons and Zooplanktons.
  • The phytoplanktons commonly include many green algae and blue-green algae.

Hence, the correct answer is option 1: (A) and (E) only.