Psychoactive drugs that alter a person’s perceptual experiences and cause a person to see things that are not real are

Ineed the definitions of all of these words nasap i will give 1o points to whoever awnsers

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.

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?