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KIM [24]
3 years ago
12

What makes an isotope radioactive? Are all isotopes radioactive?

Biology
1 answer:
soldier1979 [14.2K]3 years ago
4 0

Answer:

Radioactive Elements

In elements with more than 83 protons, all of the isotopes are radioactive. ... The force of repulsion among all those protons makes the nuclei unstable. Elements with more than 92 protons have such unstable nuclei that they don't even exist in nature.

Explanation:

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Radiation can cause breaks in human chromosomes. However, insects can survive much higher lecels of exposure. Why?
galben [10]

Explanation:

The influence from radioactivity is inversely proportional to the number of chromosomes , since , humans have more DNA , chromosomes than the insects , and  therefore , due to less chromosomes in insects , they are more resistant towards radioactivity .

As the target of the radiation is the DNA .

Hence , It is clear that insect due to lesser DNA are less prone to Radiations .

4 0
3 years ago
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nasty-shy [4]

Answer:

Cells produce energy by breaking down sugar and other molecules in the presence of oxygen to produce ATP. So the answer is "B".

Explanation:

The process of producing ATP in animal cells occurs through cellular respiration. Various processes occur in this which involve the presence or absence of oxygen. Glycolysis in the presence of oxygen leads to the production of two molecules of ATP. Glucose is broken down into pyruvate and water.

In citric acid cycle, acetyl coA is utilized to produce <u>2ATP, 6NADH and 2FADH molecules.</u>

Finally oxidative phosphorylation occurs in mitochondria. With the help of electron transport chain, ATP is synthesized by ATP synthase enzyme.

7 0
3 years ago
Why are carbon dioxide concentrations expected to increase?
garri49 [273]

Answer:

The correct answer is d all of the above

Explanation:

There are many reasons behind increasing the concentration of atmospheric carbon dioxide such as

1 Burning of fossil fuels such as coal,petroleum increases the level of atmospheric carbon dioxide.

2 Increase in Argiculture also increases the level of green house gases such as CO2.

3 Clearing of lands for increasing population and agriculture by cutting down trees also adversely effect the normal 02:CO2 ratio in the atmosphere.

6 0
3 years ago
Plants obtain energy by __________.
Gekata [30.6K]

Answer:

I don't know

Explanation:

5 0
3 years ago
Read 2 more answers
How does the process of cellular respiration help an organism maintain homeostasis?.
Pani-rosa [81]

Answer:

Cellular respiration is the process by which glucose is transformed into ATP. -- It uses oxygen and gives off carbon dioxide and takes place in the mitochondria of the cells. -- It helps maintain homeostasis by transforming energy that can be used to do cellularwork.

Explanation:

3 0
2 years ago
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