Fill in the Blank 15. Describe the structure of a lipid. It has a . head and a tail

20. The specific molecule that an enzyme interacts with is called the please help m

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Ture or false evidence for evolution includes millions of fossils

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false