Human activities have which type of impact on the environment? a) positive
b) negative
c) neither a nor b
d) both a and b

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

The first generation of offspring from the cross of two parents is called the a. f1 generation b. f2 generation c. short generation d. p generation

Is this mrna or rna need need the answer in a hurry