What two features on earth protect us from some of the suns harmful radiation?

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

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?