What is the difference between an artery and a vein? an artery carries blood away from the heart; a vein carries blood to the heart. an artery is responsible for carrying blood; a vein is responsible for gas exchange. an artery is responsible for gas exchange; a vein is responsible for carrying blood. an artery carries blood to the heart; a vein carries blood away from the heart.

Dna is colied into chromosomes in a cell

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

Do plant cells perform cellular respiration?