What characteristics do all good sources of animal fossils have in common?

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 structure in the cardiovascular system connect arteries to veins?

What will happen if two of the base pairs of the stand of the dna are switched