Can u tell me which goes which?

Vegetation that grows along the floors of tropical and temperate forests is called undergrowth. how is the undergrowth of a tropical rain forest most likely to differ from the undergrowth of a temperate forest? a. a tropical rain forest's undergrowth most likely experiences periods of dormancy during colder weather. b. a tropical rain forest's undergrowth most likely experiences periods of dormancy during rainy weather. c. the undergrowth of a tropical rain forest most likely requires less sunlight. d. the undergrowth of a tropical rain forest most likely requires more sunlight.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth