The species
tursitops truncatus normally has 15 chromosomes in an unfertilized egg cell. how many chromosomes will a somatic cell of this species have?

30 because 15 * 2 = 30

Explanation:

Tursiops truncatus belongs to mammals and it has a pair of chromosomes in each somatic cell

Somatic cell (2n) - diploid cell

egg cell (1n) - haploid cell

"a.) well–developed vascular system."

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products