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soldi70 [24.7K]
3 years ago
6

About what percentage of the entire existence of Earth have bacteria been alive?

Biology
1 answer:
mihalych1998 [28]3 years ago
6 0
At least 75% of the history of the earth
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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
salantis [7]

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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vampirchik [111]

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1.What is the difference between evaporation and transpiration? What role does each process play in the water cycle?
anygoal [31]
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2. Condensation is the return of water molecules from gaseous phase (vapor) back to liquid form. Precipitation, on the other hand, is the coming down of condensed water from the atmosphere to the earth (biosphere), which is a significant part of the water cycle.

3. Exchange pool is the pool from (or approximate amount) which water or other elements are shared (back and forth) between different spheres (such as biosphere, atmosphere, and hydrosphere) in a cycle. A reservoir on the other hand is analogous to a ‘container’ that holds large masses of water or other elements such as a lake and the atmosphere.

4. The answer is No. because, today’s waters, due to increased pollution from industrialization that spews a lot of pullutans into the atmphere, ae contamiated. The water that precipitates is tainted by gases such as sulphuric dioxide tha makes it acidic. The water also gets polluted by other pollutants in the atmpshre and biosphere and hence become a health risk to animals and humans that drink it.
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mixer [17]

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Revolution of earth around the sun

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Concerning the presence of the nucleus what is the difference between animal and bacterial cells?
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Animal cells (which are Eukaryotes) contain a nuclues, while Bacterial cells (which are Prokaryotes) do not contain a nucleus.
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3 years ago
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