CSIR NET 2024 | Life Science: Ecological Principles | 5 April

Hay is boiled in water and cooled. Some pond water, containing only heterotrophic protozoa, is added to it and kept in the dark for a long time.

Which of the following are TRUE?

I. Heterotrophic succession of protozoa will occur with an increase in total biomass.

II. The energy of the system is maximum at the beginning.

III. Succession will occur, eventually reaching a steady state in which energy flow is maintained.

IV. The ecosystem may undergo succession but ultimately all organisms will die or go to resting stages.

Which of the following is NOT a function of the ecosystem?

Which of the following is a herbivore?

Which of the following is NOT a mechanism for species coexistence?

Which of the following set of conditions will qualify a species to be considered as endangered (EN) as per IUCN criteria?