Many scientific discoveries have contributed to the explanation of how life began on Earth. Which of the following was NOT used to develop this scientific theory? A. Scientists supported Lynn Margulis' theory that eukaryotic organelles such as mitochondria and chloroplasts originated as prokaryotes that lived inside other, larger prokaryotic cells.

B. Louis Pasteur disproved spontaneous generation by showing that bacteria will not grow on meat in a sterilized environment.

C. Oparin's "primordial soup" theory was tested by Miller and Urey by passing sparks through a mixture of gases to represent lightning and within a week, several simple organic molecules had formed.

D. Darwin's argument that vestigial structures are evidence that evolution has occurred.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

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 : )

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.