Ascientific theory can be defined as a well-supported and widely accepted explanation of nature. according to this definition, which statement describes a scientific theory. a) matter is comprised of atoms. b) the sun will rise tomorrow morning. c) the sun will die in 7.5 billion years. d) the universe was created at the big bang.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

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.

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