Skeletal muscles mechanically move the body. Messages from the nervous system cause these muscle contractions.
Estuaries. Brackish water condition commonly occurs when fresh water meets seawater. In fact, the most extensive brackish water habitats worldwide areestuaries, where a river meets the sea. The River Thames flowing through London is a classic river estuary.
The correct answer is microbiology.
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Microbiology is the branch of science that study microorganism. It contains a few sub-disciplines including virology (study viruses), parasitology (study parasites), mycology (study fungi) and bacteriology (study bacteria). Studied microorganism might be unicellular (one cell), multicellular (cell colony), or acellular (without cells).</span>
<span>The correct answer is A. Photosynthesis. To conduct photosynthesis, you need chloroplasts and these are found in the leaves which is why the leaves are green. Roots don't have them and they aren't exposed to the sun and don't create energy using photosynthesis. They do however absorb nutrients from the soil.</span>
