Answer:
the shape of white blood cells
Answer:
There are both natural and human sources of carbon dioxide emissions. Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.
Explanation:
1.Reproduction
2.Heredity
3.Variation in fitness or organism
4.variation in individual characters among members of the population