Question 2
Cell Structure and OrganisationAn organism that operates at the cellular level of organization carries out its physiological activities by using its
- A.cell membrane.
- B.organelles.
- C.small size.
- D.cytoplasm.
Show the answer and explanation
Answer: B (organelles.)
Explanation
A single-celled organism has no tissues or organs; each life process is done by an organelle such as the contractile vacuole or food vacuole.