When cells lose their ability to regulate the cell cycle, they can divide at an accelerated rate and form a clump of cancer cells. This mass of cells is referred to as- a tumor
an embryo
a gland
an organ

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

Which of the following organisms are capable of self-fertilization? a. plants b. tigers c. humans