Because it’s time consuming and money consuming to observe from space so models are required
The tricuspid valve shuts. This prevents blood from flowing backward into the right atrium while the ventricle contracts. So, your answer will be the Tricuslid Valve. Hope I helped!
The arrow representing the activation energy will decrease in magnitude.
This arrow will be beginning at the x-axis and going up to the maximum of the graph. The reason that its magnitude decreases is because enzymes provide alternate pathways to reactions; the new pathway has a lower activation energy, so the reaction occurs faster when an enzyme is added. This is why enzymes are referred to as biological catalysts and are a vital part of an organism's body
Answer:
Hemorrhagic Cerebrovascular accident (CVA) also called stroke
Also an aneurysm can rupture and cause same effect.
Answer:
Ventilation and mixing outdoor air with indoor air
Explanation:
