An allele is

A. another word for a gene

B. a homozygous genotype

C. a heterozygous genotype

D. A variant form of a gene

These muscles elevate the ribs and have their origin on the inferior border of the superior rib and their insertion on the superior border of the inferior rib.

Explain how cartilage plays a major role in the movement, support, and functions of bones.

Cómo están organizadas las células en los animales

How is the cell able to remain separate from its aqueous environment?

What interactions can happen between two populations in a community

Which choice below best shows various types of genetic material in order from simplest to most complex? a. chromosome, gene, genome b. gene, genome, chromosome c. genome, gene, chromosome d. gene, chromosome, genome?

Problems the vegetable vendors face in their job

Which statement best describes why electrons are typically not included when determining the mass of an atom? The charge of a proton cancels the charge of an electron. The protons and neutrons are much more massive than the electrons.

What did the evidence that Darwin collected during his voyage on the HMS Beagle allow him to accomplish? A. to propose the theory of artificial selection B. to propose the theory of evolution by natural selection C.

List four types of evidence used to organize organisms in systematic taxonomy