1. How can embryology be used to explain evolution? 2. What are fossils? How are fossils used to explain evolution?

In familial hypercholesterolemia individuals homozygous for the allele causing the disorder completely lack receptors on liver cells that take up cholesterol from the blood stream. heterozygous have one-half the number of receptors while individuals homozygous for the normal allele are phenotypically normal. this is an example of a. epistasis b. complete dominance c. incomplete dominance d. codominance

Environmental impacts on evolution : mastery test

Describe two recent or ongoing space missions.