The difference between a tornado watch and a tornado warning is a tornado watch means that there was a tornado spotted in an area/town nearby. And a tornado warning means that there is a tornado heading towards your town/area or that there already is a tornado in your town/area. Hope this helped!
The right options are;
are disease-causing microorganisms
can be fatal
A pathogens is any substance or organism especially microorganisms that are capable of causing diseases. Pathogens include; bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease. Pathogens can be fatal and can be treated. Pathogens are diverse and they occupy essentially every environment.
Proteins help with acting as structural components in the body, speeding up chemical reactions, and transporting substances around the body. Proteins are made up of amino acids, which create enzymes. Enzymes are often affected by environmental factors in the body such as concentration, temperature, and pH.
Proteins are very important for DNA and RNA. (ribonucleic acid)
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B
The other choices are nitrogen sources for plants.
Explanation:
Plants absorb nitrates (NO₃) and nitrites (NO₂) from the soil. Plants utilize these nitrogen sources which they assimilate to make plant proteins, amino acids and nucleic acids. Animals get their nitrogen sources from proteins that they acquire from feeding on the plants. These proteins are broken down into amino acids and used to make animal proteins. The amino acids also provide nitrogen source for which nucleic acids are formed.
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