In the past, some scientists accepted the theory of spontaneous generation. This theory states that organisms can arise from nonliving matter. Now scientists generally accept cell theory to explain the origin and growth of new organisms. Which of these statements is a key idea of cell theory and a rejection of spontaneous generation? A) The cell is the basic unit of life.
B) All living things are made of matter.
C) All cells are formed from the combination of two other cells.
D) All cells arise from pre-existing cells by division.

ASAP

feral cats are estimated to eat tens of millions of native animals each night in australia

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.