What event is NOT part of the process of DNA replication? Group of answer choices
Ribosomes are constructed
Hydrogen bonds are broken by an enzyme
The strands are proofread for errors
Complementary base pairs are formed from free floating nucleotides

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.

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen