Answer:
The pressure differences on either side of the valve.
Explanation:
The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.
Hope this helps!
have a blessed day
Answer:regulation of RNA processing When a eukaryotic gene is transcribed in the nucleus.
Explanation:
the primary transcript (freshly made RNA molecule) isn't yet considered a messenger RNA. ... The pre-mRNA has to go through some modifications to become a mature mRNA molecule that can leave the nucleus and be translated.
It is very important to control the conditions of an experiment because FAILURE TO DO THIS WILL MAKE THE RESULTS OF THE EXPERIMENT INVALID.
A controlled experiment refers to an experiment that is conducted under controlled conditions. Conducting experiments under controlled conditions helps scientists to minimize the changes in all other variables with the exception of the ones been tested.
Answer:
The second one.
Explanation:
I asked my mom and shes a nurse and she said its the right one if not then she was wrong
