What process has been used for centuries by farmers to produce the breeds that most suit their needs? a. gene therapy b. genetic engineering c. creating mutations d. selective breeding

What was darwins theory of common decent

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

Which individual below would be considered heterozygous? a.dd b.dd c.dd