BIOLOGY MIDDLE SCHOOL

Sickle-cell anemia is caused by a mutation in the gene encoding hemoglobin, causing red blood cells to appear A. half-moon shaped.
B. like discs.
C. spherical.
D. long and stringy.

Answers

Answer 1
Answer:

Answer:

The correct answer would be option A. half moon shaped.

Explanation:

Sickle-cell anemia is a genetic disorder in which normal blood cells become rigid or stick and look like a crescent moon or half moon shape. In sickle-cell anemia condition, there are not sufficient healthy red blood cells or RBCs to carry enough oxygen throughout the body.

In sickle-cell anemia, the mutation causes a single change in the amino acid of hemoglobin, the building block of oxygen-transport protein. The alpha and beta subunits are the two subunits of hemoglobin. In sickle cell anemia, the beta subunit has valine at position 6 instead of glutamic acid that is present in normal hemoglobin.

Thus, the correct answer is option A. half moon shaped.
Answer 2
Answer:

I believe the answer is C

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Why does smoke appear to move when you look at it under a microscope?

Answers

Smoke particles are larger than air particles That's why we can see the smoke particles better than the air particles, gas particles always move at high speed, in random directions.The same things is happening to air particles When air particles collide with smoke particles, the smoke particle moves  the same direction as the air particle that hit it. When another air particle hits the smoke particle, it changes its direction to the second air particle, and so on. This is called Brownian motion
because its a gas and its always changing forms. hope this helped

large ecosystems with their own climate ,soil,plants,animals-fou in different parts Of the world are called what?

Answers

They are called biomes

The place where an organismlives is its habitat. Organisms
interact with both biotic, or living,
parts of their habitat, as well as
abiotic, or nonliving, parts.
1. What biotic factors can you
identify? Write at least three
examples here.

Answers

Three examples of biotic factors is late fungi, bacteria, and animals. They are all living things meaning they classify as biotic factors.
Fungi, bacteria and animals

I hope this helps

How can we use rocks to determine how an area used to look in the past?

Answers

You could use rocks by observing the dust and dirt on it, and then you could see how much cleaner/worse the ground or earth was back then.
I hope I helped! =D
Depending on how deep the rock was in the ground or the sediment around it scientific researchers in the GEO category can study the rock and find out.

Looking also at the bones or dirt you can tell by the clay or even the aged looks of it's outer physical appearance.
 
If you look at the inside of a rock , Geologists can run tests on it and find the actual age of the rock.

I really hope that this helps you out a lot.

Can fungi be a carnivore

Answers

no because they are dead and only flesh eating animals are carnivore

After reviewing the results of your science fair project, you state that water has increased the growth of fungi. This is a(n) A) analysis.
B) conclusion.
C) experiment.
D) hypothesis.

Answers

Answer:

conclusion

Explanation:

A conclusion summarizes the report by drawing inferences from the entire project and the impact of the findings or decisions. In the conclusion, you restate the hypothesis and summarize your main points of evidence for the objectives.

Answer: conclusion. C

Explanation:
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