Answer:
It happens in the diastolic phase of the cardiac cycle
Explanation:
During the diastolic phase of the cardiac cycle, blood is allowed to enter the heart when it relaxes after a contraction.
Approximately one systole (contraction phase) that lasts 300 milliseconds and a diastole of 500 milliseconds.
The death rate will most likely rise and birth rate will end up falling. (Less organisms to populate= less offspring)
B. total time and total distance
Answer:
C
Explanation: all the others are considered very important in determining a substance so they would also be important for the level of environmental risk