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mr_godi [17]
2 years ago
9

Calculate the magnification of an object with length 4cm , if the length of the drawing is 40cm

Biology
1 answer:
IceJOKER [234]2 years ago
6 0

Answer:

-0.33

Explanation:

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According to slide 12, what is the relationship between opportunistic infections and the number of T cells a person has? Explain
podryga [215]

Answer:

The fewer number of T cells a person has, the more chances to be affected by an opportunistic infection. When the number of T cells reaches 200 cells/µl, the person is at risk of being infected by other infections.  

Explanation:

The whole immune system of a person who is infected with HIV infection seems to be severely affected.  When the person is not treated or the disease is in a very advanced stage, the depletion of the T- cells turns to be very sharped, especially CD4+ T cells. At this point, the immune system can not resist the attack of other microorganisms. The <em>lower is the number of CD4+ T Cells, the higher possibility the person has to be attacked by opportunistic infections. </em>

Classically, it has been suggested that opportunistic infections appear after the CD4 + T lymphocytes reach very low levels, such as 200 cells/µl. The number of circulating T cells can be used as an indicator and a measure of global "immune competence", and the previously mentioned amount of CD4 + T cells is an accepted universal reference used to predict the risk of having one of these opportunistic infections.

8 0
3 years ago
⚠️⚠️ Based on Leah’s observations , she can conclude that the unknown substance is which of the following ⚠️⚠️
bezimeni [28]

Answer:

Acid

Explanation:

I hope this helps!!

6 0
2 years ago
The sides of the DNA molecule the rails of the ladder are composed of
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The structure of DNA is double helix which looks like twisted ladder. The sides of the DNA molecule, the rails of the ladder are composed of alternate phosphate and sugar molecules.

7 0
3 years ago
Rock densities and age of crustal relationship between them
Zarrin [17]
The older the Earth's crust, the denser it is.
6 0
3 years ago
To be members of the same species two organisms must
noname [10]
Option C is the basic definition of a species. Can you think of some examples of plants or animals that satisfy A, B, or C that are not the same species?
7 0
3 years ago
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