Answer:
<h3>The answer is D. skeletal system and muscular system.</h3>
In the musculoskeletal system, the muscular and skeletal systems work together to support and move the body. The bones of the skeletal system serve to protect the body's organs, support the weight of the body, and give the body shape.
Answer:
The Human body uses 20 amino acids to form all types of proteins
The maple trees are commonly tapped in order to extract its sap and make it into a syrup. The aim of the maple tree tap is the tissue of the tree known as the vascular tissue.
The main source<span> of </span>energy<span> for </span>cell metabolism is in the form ATP or adenosine triphosphate. It a small molecule used in cells as a coenzyme. It <span>transports chemical energy within cells for metabolism. Hope this helps. Have a nice day.</span>
Answer:
D. No, because the first atmosphere contained very little oxygen.
Explanation: