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2 years ago

A student made a model of an ecosystem inside a sealed plastic bottle. She

Biology

1 answer:

Anton [14]2 years ago

4 0

It illustrates the cycling of matter, just like in a natural ecosystem.

Option D.

<h3>Explanation:</h3>

The natural stable ecosystem is defined as the ecosystem which has the members doing their part of job and each and every member contribute to the stability of the ecosystem by completing food chains.

Here in this bottle ecosystem the boy put the stones, rocks, water which gives proper nutrition to the growing plants and animals which are also introduced by the boy. The plants produce oxygen and consume carbon dioxide whereas the animals consume oxygen and produce carbon dioxide. Thus the cycle is maintained and stability is achieved.

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Karen is working with an unknown organic substance. She mixes a sample of the substance with Benedict's solution and heats it. T

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The unknown substance is a carbohydrate sugar

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2 years ago

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Compared to healthy dog, did the enzymes from Claire’s stomach break down the protein at a low, normal, or high rate?

MrMuchimi

Answer: low rate
Explanation:
Claire is a Great Dane who was losing weight despite the fact that she is eating. Claire doesn't have an increase in appetite and also doesn't have enough energy that is required for her to play.
Claire is losing weight because food the enzymes in her body doesn't break down the food that she eats. When compared to a dog that was healthy, the enzymes from Claire's small intestine broke down protein at a low rate.

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2 years ago

A child falls and suffers a deep cut on her leg. The cut went through her skin and she is bleeding. Which of the following defen

Vesnalui [34]

Answer:

The correct answer is option C) phagocytosis in the inflammatory response.

Explanation:

Our body has an immune response mechanism for when we get hurt or when it feels that something outside our body wants to harm us, so its automatic reaction is to defend against all those bacteria and viruses that want to attack us.

The system is responsible for identifying the antigens and destroying them. The antigens are all bacteria, harmful viruses and dead substances that are found on the cells. Our system has its own proteins that are HLA antigens. But as these are normal for the body, it does not counterattack them.

There are several defense mechanisms that work as barriers to prohibit the passage of any bacteria that harm us, and one of these mechanisms is inflammation.

In this case, when our body suffers some kind of injury from a bacterium, a cut or a blow, the damaged cells release substances that spill onto the tissue through the blood vessels, causing inflammation.

This allows the foreign substance to be “locked up” and cannot enter the body.

These spilled substances also attract white blood cells, which are called phagocytes which are responsible for eating dead germs and cells through the phagocytosis process.

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2 years ago

Let’s suppose a sheep that provided the oocyte for reproductive cloning was homozygous for a gene that causes a small head. This

Misha Larkins [42]

Answer:

Small head

Explanation:

Since the genes are located in the nucleus of a cell which has being removed (but some genes are still located in the mitochondria of the ocyte) from its ocyte to fuse it with with another nucleus. Since the cell follows a maternal inheritance of gene, it would have a small head because of the presence genes in the mitochondria.

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2 years ago

What does the surface of a calm lake have in common with a contour line?

zlopas [31]

Answer;

-They are all at the same elevation

Explanation;

-Contour line on a topographical map that detail changes in elevation. This line connects points of equal elevation. Contour lines are used in Topography to show the elevation of the land on a map. When looking at a map the contour lines look very similar to how a calm lake would appear.

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2 years ago

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