Hormones regulate both the male and female reproductive systems. the principal male sex hormone is testosterone and is produced in the testes. secretion of testosterone increases sharply at puberty and is responsible for the development of secondary sexual characteristics of men and is essential for the production of sperm. sexually mature females secrete a mixture of estrogens and progesterone, both of which are produced in the a) brain b) uterus c) ovaries d) fallopian tubes

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.

a. 35°c

b. 25°c

c. 10°c

d. 40°c