Which statements describe homologous structures? Check all that apply. An example of a homologous structure is the wing of a bird and an insect.
An example of a homologous structure is the forelimb of a whale, a human, and a dog.
Homologous structures have the same function but a different structure.
Homologous structures have the same structure, but may have a different function.
Homologous structures indicate a common ancestor.
Homologous structures do not indicate a common ancestor.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

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