Question

What adaptations do complex, multicellular organisms have to allow them to deal with gas exchange?

a) Gills, spiracles, tracheal systems, and lungs
b) Lungs, stomata, and diffusion through the skin
c) Tracheal systems, spiracles, and diffusion through the skin
d) Lungs, gills, and diffusion through the skin

Answer 1

Complex, multicellular organisms have adapted various respiratory structures, such as gills, spiracles, tracheal systems, and lungs to facilitate gas exchange.

Step-by-step explanation:

Complex, multicellular organisms have adapted in various ways to facilitate gas exchange. Some adaptations include gills, spiracles, tracheal systems, and lungs. These respiratory structures allow organisms to extract oxygen from the surrounding environment and remove carbon dioxide, which is a waste product of cellular respiration. For example, fishes use gills to extract dissolved oxygen from water, while insects have spiracles and tracheal systems that deliver oxygen directly to their cells.