Which is a type of muscle that powers the cardiovascular system?

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?

Make a claim about the factors that cause inherited genetic variations within populations. also make a claim about the effects of mutations.