It would be support and movement of the skeleton
Answer:
Answer is D
Explanation:
As the heart pumps blood, a series of valves open and close tightly. These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle. The pulmonary valve is between the right ventricle and the pulmonary artery.
The answer i believe is a
Answer:
Explanation:
There are several good reasons why experiments need to be repeated: 1) The first reason to repeat experiments is simply to verify results. ... 2) The next reason to repeat experiments is to develop skills necessary to extend established methods and develop new experiments.
In scientific equations<span>, </span>photosynthesis<span> takes carbon dioxide from the air, water and sunlight to create sugar. After this happens, oxygen is released back into the air. Cellular </span>respiration<span> takes these same sugars and combines them with oxygen to release the energy as ATP.</span>