Which of the following is not one of the main components of the cell theory?
cells are only in plants and animals.
all living things are made of cells.
cells are the basic unit of life,

9. the history of life on earth is recorded in

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?