Q1. [1] medium initial-understanding
Which of the following best explains why single-celled organisms do not need a specialised digestive organ?
(a) They do not need to digest food.
(b) Their entire surface is in contact with the environment, allowing food to be taken in and digested without specialised organs.
(c) They use cilia to obtain nutrients directly from sunlight.
(d) They rely only on diffusion of gases for nutrition.
- a They do not need to digest food.
- b Their entire surface is in contact with the environment, allowing food to be taken in and digested without specialised organs.
- c They use cilia to obtain nutrients directly from sunlight.
- d They rely only on diffusion of gases for nutrition.