What are some medical issues surrounding genetic testing?

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

What are some natural processes that represent physical and chemical changes?

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called