Q1. [1] straightforward initial-understanding
Which of the following best explains why diffusion alone is insufficient for meeting the needs of all cells in a large multicellular organism?
(a) Multicellular organisms do not require oxygen.
(b) Not all cells of a multicellular organism are in direct contact with the surrounding environment.
(c) Multicellular organisms produce more waste than unicellular organisms.
(d) Diffusion only works for gases, not for food materials.
- a Multicellular organisms do not require oxygen.
- b Not all cells of a multicellular organism are in direct contact with the surrounding environment.
- c Multicellular organisms produce more waste than unicellular organisms.
- d Diffusion only works for gases, not for food materials.