<span>The correct answer is b. Option a is incorrect because these models can demonstrate scientific theories, but they don't prove scientific theories (you would need experiments for that). Option c is incorrect because the models aren't always representing something abstract (i.e. DNA is very real, just very small). Option d is incorrect because they don't precisely mimic something in nature, but instead help us visualize something in nature that is difficult to see or comprehend.</span>
Answer:
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things
Explanation:
Answer: D. Occupational health and safety
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The answer is: D. Passive transport
Passive transport refers to the movement of chemical substance that pass through the cell membrane without using any energy, This ability exist in all living cells and utilizing the process of osmosis to move from a less concentrated environment to a more concentrated one.
<span>The first organic compound is Carbohydrates. Most organisms
use is as a primary fuel or their main energy source. They make up cell
structures, and they're also used as stored energy in plants. Second is Lipids.
If we have any other energy left over in our bodies, we typically will store
that as lipids, which a lot of people think of as fats. It also makes up the
cell membrane, and coats the leaves of plants to make them waterproof and also
protect them from the elements. Third type are proteins. One use of proteins
are chemical messengers or hormones. Proteins are useful for receptors and
transport channels in order to help things move in and out of the cell. They
also help to control and regulate chemical reactions. Another use is for cell
structures, like your hair. the last one is for immunity. The fourth and last
is Nucleic Acids. There are two main uses in organisms for nucleic acids. The
first one is for protein synthesis. The other use is for our hereditary
information or how we pass our traits to our offspring.</span>
