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Arada [10]
3 years ago
8

Stem cells from human embryos are used to treat some diseases in humans. Explain why.

Biology
1 answer:
pav-90 [236]3 years ago
4 0
Stem are the cells that travel around the body to heal and part injured.
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In his attempt to develop a pneumonia vaccine, Frederick Griffith injected mice with various combinations of living and dead bac
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Answer:

The mice died

Explanation:

In Griffith's experiment, two strains of the same bacteria were used. S strain was smooth because it had a polysaccharide coat. This coat also made it virulent because mouse immune system was not able to destroy it and ultimately the mice died. R strain was rough because it did not have the coat and thus was harmless to mice.

When Griffith injected mice with dead S bacteria and living R bacteria together, the mice died. Live R bacteria had taken up the genetic material or as Griffith called "transforming principle" from the dead S bacteria and transformed into S bacteria. So live S bacteria were present again and they killed the mice.

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How many kingdoms of bacteria are ther?
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Please order the layers of a cliff side by the age of fossils found there from youngest to oldest
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Youngest to oldest would be: 3, 4, 1, 5, 2. Since it's from the bottom, the ones furthest from the bottom would be the youngest at the top. The oldest fossils would be closest to the bottom.
7 0
4 years ago
Describe the connection between the digestive and respiratory systems
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You want to study the growth of a plant what types of qualitative and quantitative data
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Quantitative is measuring example. how much it has grown. qualitative can't really be measured its more like the color of the flower or stem or the softness of the leaves etc
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