In a chemical reaction such as photosynthesis, are the substances present before the reaction.

What did hunter gathers do to alter the environment?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

The relationship between intron and exon