According to the Endosymbiotic Theory, Why Was It Adaptive for the Larger

question 68

Multiple Choice

According to the endosymbiotic theory, why was it adaptive for the larger (host) cell to keep the engulfed cell alive, rather than digesting it as food?

• A) The engulfed cell provided the host cell with adenosine triphosphate (ATP).
• B) The engulfed cell provided the host cell with carbon dioxide.
• C) The engulfed cell allowed the host cell to metabolise glucose.
• D) The host cell was able to survive anaerobic conditions with the engulfed cell alive.

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Definitions:

DDT

Dichloro-Diphenyl-Trichloroethane, a synthetic insecticide used historically for malaria and pest control, now banned in many countries due to environmental impact.

Nitrogen Cycle

A biogeochemical cycle that describes the transformations of nitrogen and nitrogen-containing compounds in nature.

Nitrogen Fixation

The process by which nitrogen gas from the atmosphere is converted into ammonia by certain bacteria, making nitrogen available to living organisms.

Denitrification

A microbial process occurring mostly in soil and aquatic environments, where nitrate is reduced and ultimately produces molecular nitrogen, removing it from the ecosystem.