Ascientist wants to change the dna of a sexually reproducing organism and have the new dna present in every cell of the organism. in order to do this after fertilization, she would change the dna in which of the following?

testes of the father

placenta

zygote

ovaries of the mother

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables