Phosphate and deoxyribose sugar
The scaly skin of a snake is homologous to skin of a lizard.
Homologous is a term used to describe a part of two different animals that come from a common ancestor. This makes the part will have a very similar structure.
Other similar terms would be analogous where the part of the animals will have similar functions but comes from a different ancestor, thus have a different structure.
Upwelling brings greater concentrations of dissolved nutrients to the ocean surface
Answer:
the answer is the second one
Explanation:
say, your mom is make cookies, and she goes to the store to buy the ingredients and comes back, the ingredients are the reactants, and the cookies are the products, make sense?