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Verizon [17]
3 years ago
15

Of all the water on Earth, what is the percentage of drinkable fresh water?

Biology
1 answer:
yaroslaw [1]3 years ago
7 0

It might be 23% because 77% of water covers earth and most of the water is either polluted or salt water.

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during t cell maturation, the t cells must pass two tests. first, immature t cells that can recognize mhc molecules are [ select
tatuchka [14]

During T cell maturation, the t cells must pass two tests. first, immature t cells that can recognize MHC molecules are Selection. Second, immature t cells that recognize and bind to molecules normally found in the body are Activation.

Selection is the first test that T cells must pass. During this process, immature T cells that can recognize MHC molecules are selected. MHC molecules are found on the surface of cells and are involved in antigen presentation. When T cells come into contact with MHC molecules, they are able to recognize the molecules and begin the process of selection. During selection, the T cells that recognize MHC molecules are chosen over those that do not. This helps ensure that the cells that are selected are those that can properly respond to antigens.

The second test that T cells must pass is activation. During activation, T cells that recognize and bind to molecules normally found in the body are selected. These molecules are called self-antigens and can include proteins, carbohydrates, and lipids. When T cells come into contact with self-antigens, they are able to recognize the molecules and begin the process of activation. During activation, the T cells that recognize self-antigens are chosen over those that do not. This helps ensure that the cells that are selected are those that will not attack the body’s own cells.

Learn more about self-antigens at : brainly.com/question/24468411

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6 0
1 year ago
What conclusions can be drawn about the greater
svet-max [94.6K]

The number of sunflower sprouts will be higher than birch tree sprouts because sunflower sprouts have a higher growth rate than birch tree sprouts.

<h3>What is the growth rate?</h3>

Growth rate refers to the ratio of development of a given population and/or biological structure.

The growth rate may result very useful in ecology studies as above mentioned (ecological succession).

In conclusion, the number of sunflower sprouts will be higher than birch tree sprouts because sunflower sprouts have a higher growth rate than birch tree sprouts.

Learn more about the growth rate here:

brainly.com/question/1078756

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4 0
2 years ago
Whats the correct answer to the question ?
Alex17521 [72]
What question are you talking about?
7 0
3 years ago
All life on earth is made of which<br> element?
ddd [48]

Answer: Hydrogen

Explanation:

Because it is the element that everything is created with it is everywhere. All life has hydrogen in it, our air, SPACE, everything.

3 0
2 years ago
Hi can someone help with these punnet squares?
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I’m sorry i don’t know the answer but i wanted to warn you to NOT click on the link. it supposed to track your location. at least that’s what i heard
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2 years ago
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