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Setler [38]
4 years ago
13

Which of the following contaminants is radioactive?a. benzene b. plutonium c. mercury d. lead

Biology
2 answers:
s344n2d4d5 [400]4 years ago
7 0
Try going with B. plutonium
alexandr402 [8]4 years ago
7 0

Answer:

The correct answer is option b. "plutonium".

Explanation:

Plutonium is a chemical element with the symbol Pu and the atomic number 94. Plutonium is known for being a very dangerous radioactive contaminant for most of its isotopes. For instance, Plutonium-239, the isotope found in some fuels, is much more radioactive than Uranium-238.

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Answer:

Less water.

Explanation:

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6 0
3 years ago
Physical barriers that help prevent an individual from contracting diseases include __________. a. white blood cells, enzymes, t
Nostrana [21]

Sweat, tears, skin, and mucous membranes are among the physical defenses that keep a person from being sick.

<h3>What causes infectious diseases?</h3>

Coming into contact with a person or an animal who has the virus is one of the most straightforward ways to obtain the most contagious or infectious diseases. Direct contact, such as person-to-person contact, can transfer contagious diseases. Direct transmission of bacteria, viruses, or other germs from one person to another is the primary method by which contagious diseases are typically disseminated. If someone who is unaffected touches, kisses, coughs, sneezes, or has the virus or bacterium on them, this could happen. Additionally, these pathogens can disperse through sexual contact and the exchange of bodily fluids. The person who spreads the infection may only be a carrier and not exhibit any signs of the illness.

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4 0
2 years ago
Chromatin modifications that tend to inhibit transcription include:
Masteriza [31]

Answer:

a. methylation at lysine 9 or 27 of histone H3.

Explanation:

Methylation causes the switching off of genes using steric hinderance to prevent access to DNA.

5 0
3 years ago
Given what you know about Cell Division, what would be your reasoning for why the cell spends the most amount of time in _______
fgiga [73]

Answer:

Interphase is the longest phase in the cell cycle.

Explanation:

6 0
2 years ago
Which of the following does NOT improve a species ability to survive?
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The answer is D. competition
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