Darwin reasoned that natural selection had been the reason for organisms matching so well to their environments.
Answer:
Precipitation
Explanation:
Although the options are missing in the question, one word that can be solely used for rain, sleeet, snow and hail is "<u>preciptation</u>".
Principally, precipitation is a meteorological phenomenon that allows the <u>condensation of atmospheric water vapors</u> to make them fall on the Earth's surface under gravity. It is important to consider that fog and frost couldn't be considered as precipitation because, in these processes, water vapours don't fall on the Earth's surface.
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.
