Please need help on this, it’s due soon!

an organ is created by a group of tissues that have the same functions

tissues are composed o cells that have the same function

a group of organs work together to form an organ system

Explanation:

the answer is: metamorphic rocks often show the presence of fossils, also a

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-lavira: )

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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