What would happen if there was no condensation stage in the water cycle

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.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?