Proteins are polymers formed from
a. lipids
b. amino acids
c. carbohydrates
d. nucleic acids

Which feature of a human community is similar to a niche in a biological community

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.

Why has two different alleles for the same trait?