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vovangra [49]
3 years ago
9

Question text The skeleton of an echinoderm is composed of individual plates called

Biology
1 answer:
vitfil [10]3 years ago
6 0

interlocking calcium carbonate plates is the answer.

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Newton solved the problem of what holds the solar system together. How did this change the view of the universe?
myrzilka [38]

Newton's law of gravity helped to change the initial view that the Universe was supported by some mystical force or object.

<h3>What did Newton say held the Solar system together?</h3>

Newton's explanation that the Solar system was held together by the force of gravity helped to explain so many observation which were not explained before.

Newton's explanation that objects were attracted to one another by the force of gravity helped to change the view that the Universe was held together by some mystical or magical force or that the earth and other planets were supported on something.

Therefore, Newton's law of gravity helped to change the initial view that the Universe was supported by some mystical force or object.

Learn more about law of gravity at: brainly.com/question/3681346

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2 years ago
What plant tissue moves sugars down to the roots within a plant?
grin007 [14]
The Phleom does that action. Hope this helped! :)
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3 years ago
Compare the excretory system and urinary system
nignag [31]
Excretory System is the wastes that gets out of your body by sweat, gas and other types of wastes.Urinary system rids the blood of wastes produced by the cells.
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3 years ago
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Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e
cricket20 [7]

Answer:

  • The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
  • According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
  • After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.
8 0
3 years ago
Plzplz ppz help with this riddle! Links will be reported. Thank you!
fgiga [73]

Answer: Hello Luvv

Green st patrick's day.

Explanation:

Hope this helps

Mark me brainset please.

Anna ♥

5 0
2 years ago
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