How will the properties of an atom affect the way that it bonds with another atom to from a compound

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.

What statements describe a host organism?

According to the cladogram, which organisms have roundworms as a common ancestor?