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Effectus [21]
2 years ago
7

How does the mutation present in 10% of Europeans protect their cells from HIV?

Biology
2 answers:
worty [1.4K]2 years ago
7 0

Answer:

The mutation, which affects a protein called CCR5 on the surface of white blood cells, prevents HIV from entering these cells and damaging the immune system. Around 10% of today's Europeans carry the mutation, a significantly higher proportion than in other populations.

Explanation:

I hope this helps:)

Alexandra [31]2 years ago
6 0
The mutation, which affects a protein called CCR5 on the surface of white blood cells, prevents HIV from entering these cells and damaging the immune system. Around 10% of today's Europeans carry the mutation, a significantly higher proportion than in other populations.
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2 years ago
What genus of protists appears to contradict the statement that unicellularity restricts cell size?
Soloha48 [4]

The correct answer is D. Caulerpa

Explanation:

Protists are a type of unicellular organisms that are eukaryotic which means they contain a defined nucleus but that are not plants, animals or fungus. Considering protists only contain one cell in most of the cases they are small or restricted in size this includes Dictyostelium which are microscopic organisms that consume bacteria and plasmodium. However, in the case of Caulerpa, these are not limited to size as Caulerpa is a type of alga that has macroscopic cells and indeed in some cases can be around 3 meters long. On the other hand, Ulva is also an alga but is considered in the plants' domain and therefore is not a protist. Therefore the one that contradicts contradict the statement that unicellularity restricts cell size in protists is the Caulerpa.

3 0
3 years ago
The role of the excretory system is to rid the body of toxic waste products. Which of these body systems also plays a direct rol
hammer [34]

Answer:

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In humans, it is composed of nose, pharynx, larynx, trachea, bronchi, pair of lungs, and diaphragm.

Alveoli (in lungs) are the site of gaseous exchange where oxygen is exchange with carbon dioxide.

Carbon dioxide is the toxic waste product of cellular respiration. Circulatory system helps in transporting CO₂ from cells to the alveolar site where it is exchanged with oxygen and excreted out as a part of exhaled air.

5 0
3 years ago
Why is it important to keep a microscope covered when you’re not using it?
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3 0
3 years ago
Which group of invertebrates is most closely related to vertebrates?
MissTica

Answer:

cephalochordates

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3 years ago
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