Answer:
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. Keratinocytes contain structural keratin and make up the bulk of the epidermis.
Answer: The atomic number represents the number of protons and the number of electrons. For example, if an element has an atomic number of 5, you can conclude it has 5 protons and 5 electrons.
Explanation:
See the answer above. Hope this helped! :)
Answer:
A bird or feathered dinosaur is Archaeopterix.
Explanation:
Archeopteryx is an extinct genus of primitive birds, with intermediate characters between feathered dinosaurs and modern birds.
Archeopteryx lived in the Upper Jurassic Period about 150 million years ago, in what is now southern Germany, during a time when Europe was an archipelago of islands in a shallow warm tropical sea, much closer to the equator of what is now.
