[Campbell Biology P.1070] The water flea Daphnia is presented as an example of an animal that... | Practice Question

The water flea Daphnia is presented as an example of an animal that can reproduce both sexually and asexually. Under what environmental conditions does Daphnia typically switch to sexual reproduction?

  • A: When abundant energy sources are available.
  • B: During periods of environmental stress.
  • C: When temperatures are consistently warm.
  • D: After a long period of asexual reproduction.

Explanation

The text explicitly states: "Daphnia reproduce asexually when environmental conditions are favorable and sexually during times of environmental stress." This highlights that sexual reproduction is a strategy adopted under challenging conditions.