Mutations can be man made but natural selection is a species changing due to the environment
Answer:
more than one.............
As the cell increases , the ratio of surface area to weight of the cell decreases . this decreases the efficiency of the rate of diffusion and metabolism of the cells therefore the larger the cell the less efficient to maintain the effectiveness of the body a large cell will divide rather than continue to grow
Answer: Higher infant mortality rates cause higher fertility rates.
Explanation:
Countries with high infant mortality rates are usually countries where families rely on children to help out the family. High infant mortality rates and a need for children means that those people will continue to try to have children until they have some that survive. If more children die, and people need to have more children, there will be a higher fertility rate.
B. rapids and waterfalls hope that helps
