Veins take blood back to the heart. which gas would be most abundant in a vein that takes blood from muscle cells in the arm back to the heart? a) carbon dioxide b) oxygen c) nitrogen d) hydrogen

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Which organelle breaks down sugar molecules that supply energy to the cell ?

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not