They change cause they want to change so leave them alone
C. Molecule use active transport to faclitate movement against the concentration gradient
through the use of energy
The steroid hormone is secreted by three glands- adrenal cortex, ovaries, testes.it is derived from cholesterol
Natural selection is the process by which stronger genes will be passed down through generations. Animals with specific traits and genes will be able to survive the conditions, while others will die
