Answer:
Mammals, insects, fish and plants all have different systems of exchanging gas. For mammals we breathe into our lungs, for fish they use gills and insects use spiracles.
Explanation:
hope it kind of helps sorry if it doesn't
Answer:
Earth's continents were once connected in a single supercontinent.
Explanation:
v
Correct answer - Vitamins.
Why? - Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C).
