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Andreyy89
3 years ago
10

30 POINTS ASAP

Biology
1 answer:
Helen [10]3 years ago
7 0
Scientist combine-several well-tested techniques to find out the ages of fossils. The most important are Relative Dating, in which fossils and layers of rock are placed in order from older to younger, and Radiometric Dating, which allows the actual ages of certain types of rocks to be calculated. There is no way to calculate an "absolute" age. Relative Dating. 
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macromolecules,polymer

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Two different mature mRNA transcripts are produced from this gene, one is approximately 2000 nucleotides long, the other is appr
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Alternative splicing explains how it works

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The leaves at the top of a tree’s canopy are exposed to direct sunlight during the day, and their phytochromes will occur in a h
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Explanation:

1)Pfr/Pr

2) Pr

3)far-red

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The leaves at the top of a tree’s canopy are exposed to direct sunlight during the day, and their phytochromes will occur in a high *Pfr/Pr* ratio. Meanwhile, the leaves of the same tree at the bottom of the canopy are highly shaded during the day and will likely have a higher proportion of the * ( PHYTOCHROME )Pr *;form of phytochrome present due to exposure to a higher proportion of *FAR RED * light.

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