Asealed metal container holds a gas. what happens when the container is heated?

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.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these