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Rus_ich [418]
3 years ago
5

mr. and mrs. zuhl were professional fossil collectors why my not they have collected precambrian fossils

Biology
1 answer:
Reptile [31]3 years ago
5 0
The precambrian era makes up about 90% of the earths history, but there was little to no living organisms at the time other than microscopic ones. The first eukaryotes were found in the cambrian period after the precambrian period, not only that but at the end of the precambrian era in the Proterozoic era there was a mass extinction of about 70-80% of all living organisms

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Which of the following is a way that new DNA can be introduced to bacteria?
OLEGan [10]

Answer:

B

Explanation:

<em>The correct answer here would be that </em><em>it can be injected by a virus.</em>

Since a virus operates by taking over the genetic system of the host and uses its replication, transcription, and translation to make virions or viral particles through the lytic or lysogenic life cycle. In the process, if the virus is utilized as a vector to carry a foreign DNA, the DNA is introduced into the genome of the bacteria. This is exactly what happens during the process known as transduction.

<em>The correct option is, therefore, </em><em>B.</em>

4 0
3 years ago
Question 8 (1 point) What type of cells line the collecting duct of the medullary region of the kidney?
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Explanation:

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2 years ago
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Gene expression might be altered at the level of post-transcriptional processing in eukaryotes rather than prokaryotes because o
Iteru [2.4K]

Answer:

<h2>As transcription and translation occurs in different location in eukaryotes, while in prokaryotes, both the processes occurs at same location,  post-transcriptional processing in eukaryotes. </h2>

Explanation:

The transcription and translation occurs in different location in eukaryotes, while in prokaryotes, both the processes occurs at same location and can be co-translation.

As, in eukaryotes, the transcription occurs in the nucleus and then this transcript have to move in the cytoplasm to translation, so before reaching in the cytoplasm, various modifications occur in this transcript known as post transcriptional modification or processing ( include 5' capping, 3' poly-adenylation and RNA splicing).

As, in prokaryotes, both transcription and translation occur at same place so there is no time for modification for transcript because translation starts as the transcription is still going on.

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3 years ago
Why would you need a microscope to see a prokaryotic organism?
Katen [24]
Beacause prokariyotics are unicellular organisms.
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3 years ago
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