Answer:
1. c 2. a
Explanation:
Diffusion
Diffusion is the net passive movement of particles (atoms, ions or
molecules) from a region in which they are in higher concentration to
regions of lower concentration. It continues until the concentration of
substances is uniform throughout.
Some major examples of diffusion in biology:
• Gas exchange at the alveolar — oxygen from air to blood, carbon
dioxide from blood to air.
• Gas exchange for photosynthesis — carbon dioxide from ai
