Answer:
B. between 400 million and 500 million years
Explanation:
Process of elimination
Autorhythmic, contractile, cardiac
Answer:
it is because the blood cells will have too much water in them and they will burst.
Explanation:
there will be less salt inside the cells so all the water will enter the cells. if there is also salt present outside of the cell then the water and the electrolites(salt) will equalize between the inside and the outside of the cell.
The other name for carbon dioxide is carbonic acid gas
Answer:
Explanation:
A theory is a hypothesis that has been supported with repeated testing. A scientific law is a statement that summarizes the results of many observations. Experimental data must be verified by reproduction from other scientists. Theories must agree with all observations made on the phenomenon under study.