Enzymatic breakdown of which of the following compounds doesn't begin until it reaches the stomach?

a) lipids
b) carbohydrates
c) proteins

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

What type of competition exsist between two species. turtles and fish

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment