Answer:
B
Explanation:
Radiometric dating uses naturally occurring radioactive elements such as carbon-14 within the rock or fossil to estimate its approximate age. The half-life of the element must also be known. The amount of the radioactive trace element is compared to, in a ratio, with that of the number of the decay product elements. This approximate age can then be relatively compared to those of other rocks or fossils.
<span>The anwser is A polypeptide
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Studing the activity of plants yr welcome
Answer:
Point source pollution:
- Oil from a garage that is released into water
Non-point source pollution:
<u>Explanation:</u>
According to <u>United States Environmental Protection Agency (EPA)</u> regulations, <u>point source pollution</u> is a type of pollution in which contaminant is released into the environment from an <u>easily identified source</u>. In the examples given above, smoke from a factory, sewage, and oil effluents are coming from easily identifiable sources.
On the other hand, a <u>non-point source of pollution</u> is the release of contaminant in the environment <u>through diffused or unidentifiable sources</u>. In the examples given above, smoke from cars could be stated as non-point sources of pollution because vehicles are in a continously moving state.
Two bacterial foodborne diseases is the infective dose thought to be very low are E. coli 0157:H7 and listeriosis.
- Escherichia coli (abbreviated as E. coli) are bacteria found in the environment, foods, and intestines of people and animals. E. coli are a large and diverse group of bacteria. Although most strains of E. coli are harmless, others can make you sick.
- Listeriosis is a potentially fatal sickness caused by consuming food infected with the bacteria Listeria monocytogenes. Each year, an estimated 1,600 people contract listeriosis, with approximately 260 dying. Listeria monocytogenes (L. monocytogenes) is a pathogenic (disease-causing) bacterium found in wet habitats, soil, water, decaying vegetation, and animals, and it may survive and even thrive under refrigeration and other food preservation procedures.
To learn more about E. coli 0157:H7 and listeriosis.
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