Answer:
Option C
Explanation:
Option A is incorrect as mutations may be detrimental to the organism and are not always beneficial. Option B is incorrect as there are instances where mutations may enable organisms to be better adapted to the environment. Option D is incorrect as genotypes are not selected for or selected against by environmental pressures, it is only the phenotype (exhibitable/ visible traits) that can be selected for or against, hence option C is the answer.
Answer: Abrasion
Abrasion is a geological phenomena in which weathering and erosion of the rocks or other hard surfaces by physical agents like water and wind. In this process, the surface material is scrapped, scratched and wear down by the frictional force exerted by the physical agents.
The sawing and grinding action of the rock fragments in the water is called as abrasion because here the water is the physical agent affecting the physical structure of the rock.
Answer:
B. to cut DNA into fragments of different lengths
(on e2020)
just got a 100%
B) concurrent transcription and translation
C) translation in the absence of a ribosome
D) gene regulation
Answer:
The correct answer is B) concurrent transcription and translation
Explanation:
In eukaryotes transcription occurs in the nucleus of the cell then this transcript is transported outside the nucleus in the cytoplasm through the nuclear pore for translation to take place because ribosomes other important enzymes are present in the cytoplasm of the cell. So nucleus separate transcription and translation in eukaryotes.
In prokaryotes there is no such membrane-bound nucleus, therefore, the prokaryotic genetic material is present in the cytoplasm of the cell and transcription and translation runs together which means translation occur simultaneously with transcription in prokaryotes.
So in prokaryotes, concurrent transcription and translation occurs, therefore, the right answer is B.
The process that occurs in prokaryotes but not in eukaryotes is concurrent transcription and translation. Prokaryotes can synthesize mRNA and translate it into proteins simultaneously because they lack a separating nucleus, unlike eukaryotes.
The process that occurs in prokaryotes but not in eukaryotes is B) concurrent transcription and translation. In prokaryotes, due to the absence of a nucleus, mRNA synthesis (transcription) and protein synthesis (translation) occur simultaneously in the cytoplasm.
On the other hand, in eukaryotes, the nucleus separates the processes of transcription and translation; transcription occurs inside the nucleus and translation takes place in the cytoplasm. Post-transcriptional splicing, gene regulation, and translation with a ribosome all occur in both types of cells.
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