Skin serves as a protective barrier, a way to sense the world, and a layer that keeps nutrients and water inside the body. Four types of cells make up the skin, and they are produced mainly in the epidermis near the basement membrane.
A polymer is a large molecule made up of many ____. The four categories of biological macromolecules are ___, ___, ___, and ___. carbohydrates, proteins,lipids, and nucleic acids, The type of macromolecule that is used primarily as a source of energy is ___.
Answer:
B. All of its cells must work together
Answer:
increasing
Explanation:
the sun is not bad for plants. In fact, it makes them grow. Its like without no food.
Answer:
measure the time it takes for a dog to run a certain distance
