Astronomers have determined the temperature of a newly discovered star. when their results , which of the following will they use?

a. thousands of kelvins

b. billions of astronomical units

c. millions of light- years

d. hundred meters per second

Describe how alleles and genes are related

Individuals do not compete directly for resources, but are prey for the same predator

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food