How do secretions from sweat glands kill microorganisms?
a. reducing the ph of the skin surface
b. drowning them
c. sticking them together

Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere

Johannesburg kepler, an apprentice of brahe, believed in the heliocentric universe but rejected past astronomers belief in

What is the most abundant vertebrate on earth?