1.The presence of valves 2.the milking action of skeletal muscles 3. the veins as the muscles contract
1. the inheritance of each gene is determined by the units that are passed down 2. an individual will get one unit from each of their parents
3. a trait may not show up on an individual but it can still be passed on to a descendant
By the excretory system through the large intestine
Apoptosis is important for programmed cell destruction when a cell begins to grow abnormally, or when cells become inefficient at completing the cell cycle and providing the specific set of functions to the organism.
(cancer/abnormal cells, and old cells)
The first is reflection of moonlight