A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The F₁ plants have yellow seeds. What is the expected phenotypic ration of seed color of the offspring of an F₁ x F₁ cross?
A) 1:2:1
B) 2:1
C) 3:1
D) 9:3:3:1

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.