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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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Help me plz I dont know this
Korvikt [17]
1. Producers have the most energy in the pyramid.
2. Tertiary Consumers have the least energy (top one)
3. The importance of decomposers in the ecosystem is breaking dead animals down and turning non living things into nutrients. These nutrients make the soil better helping plants grow.
4. 900 kcal
5. Another name for producer is autotroph.
6. The amount of energy for a primary consumer is 9,000 kcal.

good luck :)
6 0
3 years ago
What part of the respiratory system do you think is most important? Provide a thorough explanation to support your answer.
Luden [163]

Answer:

The most important are the lungs, more precisely the alveoli.

Explanation:

Alveoli are structures of the lungs where gas exchange occurs. They allow oxygen from the air to pass into blood. Oxygen diffuses through the walls of alveoli into the capillaries that surround it. Oxygen is then bonded with the iron in red blood cells and travels to the heart. The heart then sends the oxygenated blood out to all the cells in the body.

4 0
4 years ago
What is not a principle of the cell theory
Vlad [161]

The cell theory consists of:

1. all living organisms are made up of cells

2. cells are the basic structural/organizational unit of all organisms

3. all cells come from pre-existing cells

8 0
3 years ago
In an analysis of the nucleotide composition of DNA, which of the following proportions will be found?
katrin [286]

Answer:

With respect to the composition of DNA, in an analysis it can be found that the proportions of nucleotides are A + C = G + T (option a).

Explanation:

The proportion of nucleotides in a DNA molecule can be established according to the sequence of these nucleotides on both complementary strands, since the purinic bases of one strand are complemented by the pyrimidinic bases of another:

  • <em>Adenine is complemented with Thymine A=T</em>
  • <em>Guanine is complemented with Cytosine G=C</em>

From this we can deduce that in a DNA molecule with two chains there will be the same amount of adenine and thymine, as well as the same number of guanine with respect to cytosine, so:

<em>     A + C = G + T</em>

An example of this would be a known DNA molecule (hypothetical), with 5 molecules of Adenine and 7 molecules of Guanine. In this case there are 5 Thymines, complementary with Adenine, and 7 Cytosines like Guanine:

<em>     A + C = G + T</em>

<em>     5 + 7 = 7 + 5</em>

6 0
3 years ago
What interventions could increase monogamy among meadow voles?
bagirrra123 [75]

Upregulation of vasopressin and oxytocin in the spinal cord using microcatheter interventions could increase monogamy among meadow voles. the correct answer is option(e).

In contrast to non-monogamy, monogamy is a type of dyadic interaction in which an individual has only one partner during their lifespan or, alternatively, just one partner at any given moment. The phrase is also used to describe how some animals behave in social situations, specifically the status of having just one mate at any given time.

Inhibitory interneurons may be activated by oxytocin and vasopressin across subcortical and possibly cortical networks, including reward pathways, to moderate their effects. Brain areas that are important for maintaining behavioral and physiological equilibrium are where oxytocin and AVP are largely produced. These two peptides are produced by several cells in distinct areas of the brain, including the supraoptic nucleus (SON) and paraventricular nucleus (PVN) in the hypothalamus.

To know more about monogamy refer to:  brainly.com/question/13161546

#SPJ1

5 0
2 years ago
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