Which relationship will increase a population's size

a. emigration rate > immigration rate

b. death rate > birthrate

c. number of males > number of females

d. birthrate > deathrate

What protects the lining of the stomach from acidic gastric juices?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Why are trees green on top sometimes and brown down low sometimes. complete sentences peoples!