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muminat
3 years ago
6

Kohler and lipton first discovered a growth factor (pdgf) by:

Biology
1 answer:
Juliette [100K]3 years ago
5 0
<span>Observing that fibroblasts grew better in cell culture when blood serum was added to the growth medium instead of blood plasma. Thus proving that there was a substance in serum that made it easier for fibroblasts to grow.</span>
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A random mutation occurs and the GGA codon is changed to GGU. What effect does this substitution have on the amino acid being ca
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Answer:

Instead of arginine codon, proline condon would be coded.

Explanation:

GCA encodes codes for glycine while on the other hand codon to GGU, GGC, or GGG encodes for glycine.

This substitution will lead to generation of complementary code “Proline” in the complementary mRNA or DNA strand.  

The codon CCT, CCC, CCA, CCG encodes for proline. If this mutation would not have occurred then Arginine would have been encoded in the complementary codon  with base structure of CGT, CGC, CGA, CGG

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3 years ago
Which statement best describes the orbit of Earth?
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B. Earth rotates on its own axis and revolves around the Sun.

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The earth moves not only in one way but in two ways. It revolves around its axis and revolves around the Sun.

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When the Earth revolves around its (imagined) axis, we call such a movement a rotation, and when it revolves around the Sun - a revolution.

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d. All of the above

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Plant roots usually respond to gravity by<br> demonstrating
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they tried to swim away but got eaten by a shark

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