A. The burning of large quantities of fossil fuels which take millions of years to replenish
Explanation:
If the concentration of molecules outside the cell is very high relative to the internal cell concentration, the rate of diffusion will also be high. If the internal and external concentrations are similar (low concentration gradient) the rate of diffusion will be low.
The jet stream flows west to east
Hey Leeann479!
The chart that shows all the possible combinations of alleles that can result from a genetic cross is called a
Punnett Square! I've attached an example of one to this answer.
Hope this helps!
(image credit: Wikipedia)
Explanation:
who many chambers does the heart has