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patriot [66]
3 years ago
8

The amount of the earth's surface covered by oceans is approximately what ?

Biology
1 answer:
Dmitry [639]3 years ago
4 0

Answer:

3/4

Explanation:

I would have to say this because earth is covered in about 71% of water and 3/4 is closest to that. :)

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Definicion del nivel celular
olga2289 [7]

Answer:

Se llama el nivel celular que se compone de células. Mientras tanto, una célula es la unidad estructural y funcional más pequeña que puede reproducirse independientemente en un ser vivo. Las células suelen ser microscópicas.

Explanation:

6 0
3 years ago
How could stem cells prove helpful in the treatment of cardiovascular diseases? A) Stem cells can differentiate to form heart mu
Akimi4 [234]

Answer:

A

Explanation:

Cardiovascular diseases involves the heart.

Any of the above options with regards to blood (etc, white blood cells, red blood cells) are related to circulatory system, not affecting the function of the heart.

Stem cells performing apoptosis to remove old cells is a myth. Stem cells can only differentiate to form cells of the same lineage, not causing other cells to undergo apoptosis. The only external factor that can cause cells to undergo apoptosis is a type lymphocyte in the immune system

7 0
3 years ago
Which capillary would be least likely to allow substances to enter or exit the blood due to tight junctions that join the endoth
vodka [1.7K]

Answer:

Those capillaries that have endothelial cells tightly attached have an increase in cell-to-cell junctions, such as desmosomal junctions that are poorly permeable to substances.

These capillaries generally function as conductors or collectors and not as permeabilizers like the pulmonary capillaries that are fenestrated and allow a high passage of substances and gases.

The capillaries are waterproof and prevent the passage of substances or fluids such as in the blood-brain barrier that is very selective

Explanation:

The blood-brain barrier is too selective since it is not favorable for the organism that many fluids, drugs, substances or chemical compounds enter the brain space.

This is the reason why the vessels are waterproof and why pharmacology was challenged to invent drugs that could cross this barrier since it was considered impossible.

An example is dopamine, which in parkynson's disease the levo group is added to dopamine, thus forming levodopamine as a product, this is the only way that the drug crosses the blood-brain barrier and can pass the impermeable barrier generated by capillaries with endothelial cells that are close to each other or closely linked

7 0
3 years ago
PSYCHOLOGY
nikklg [1K]

Iris is most likely being negatively stereotyped as being gifted.

Option D

<h3><u>Explanation:</u></h3>

Many students who have proven to be gifted intellectually are likely to face struggle and negative feedback from their classmates. This is generally because they believe that the gifted student will get special treatment above the other student. Furthermore, it is evident that gifted students are likely to have different interests than their peers or much deeper knowledge of the common interest. They use terms which peers might not understand, barring them from having an effective conversation.

To maintain a balance in the class, teacher's are trained in a specific field in which they learn how to treat all the students equally, gifted or not. That helps reverse the negative stereotype or bring it down to a minimal level. As for students interacting with each other, several activities are put to place to encourage healthy interactions.

3 0
3 years ago
Peat is a mixture of partially decomposed plant and animal material found in waterlogged, acidic, anaerobic environments. people
Verizon [17]

because the total time for restoration is lengthy, peat can be considered a fossil fuel. The correct option is B.

<h3>What exactly are fossil fuels?</h3>

Fossil fuels are fuels derived from the remains of dead plants and animals that decomposed over time under intense heat and pressure.

Because their replenishment time is longer than a human lifetime, fossil fuels are non-renewable energy sources.

Some examples of fossil fuels are petroleum, coal, etc.

The missing options of the question are:

  1. peat is a fossil fuel because rewetting it takes only 3-5 years.
  2. peat is a fossil fuel because the total time for restoration is lengthy.
  3. peat is not a fossil fuel because it has biologic origins, making it a biofuel.
  4. peat is not a fossil fuel because humans can promote the replenishment of peat.

The restoration process of peat takes a long time of more than 100 years. As a result, because the total time for restoration is lengthy, peat can be considered a fossil fuel.

Thus, the correct option is B.

For more details regarding fossil fuels, visit:

brainly.com/question/2029072

#SPJ1

3 0
2 years ago
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