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Nadusha1986 [10]
3 years ago
12

The human passageway that remains open due to the presence of

Biology
1 answer:
Ivan3 years ago
8 0
The human passageway that remains open due to presence of cartilaginous rings
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What factor slows transcription?
Leya [2.2K]

Repressor slows down transcription.

RNA Polymerase enzyme transcribes mRNA from DNA.

Explanation:

Promoters are the 100 to 900 bps long sequence of DNA, that helps in the initiation of transcription. The transcription gets slow down as repressor bind to the promoter region hampering the attachment of RNA Polymerase enzyme which is responsible for transcription.

The process of transcription is the conversion of DNA into mRNA as told in the central dogma of molecular biology. Enzyme responsible for transcription is RNA polymerase. It is the first phase of gene expression, where DNA strand is copied into mRNA called a primary transcript.

7 0
3 years ago
What are the genotypic results as a ratio
Dvinal [7]

Answer:

The genotypic ratio shows the number of times a characteristic of an organism will be seen in the offspring when genes for certain traits are crossed. ... The genotypic ratio for this cross is written 1:2:1. In animals and plants, each gene has 2 alleles or variations, one from each parent

Explanation:

5 0
3 years ago
A species of elm has winged-seeds. How would biologists explain how a species of elm with winged-seeds evolved from an ancestral
dimaraw [331]

Answer:

In an ancestral elm species, mutations gave rise to the phenotypic trait "winged-seeds". Subsequently, selection favored elm plants with winged-seeds that diverged over time to become a separate species

Explanation:

A mutation is a genetic change in the DNA sequence. In general, mutations have a negative impact on the fitness of the individual (i.e., mutations are generally deleterious) and therefore they disappear from the population. However, there are situations where mutations are beneficial and confer an adaptive advantage, thereby increasing their frequency in the population. In this case, mutations associated with the formation of winged-seeds conferred an adaptive advantage (i.e., higher seed dispersal capacity) to individuals who had this phenotypic trait, thereby these individuals had more chances to reproduce and pass their genes to the next generation. Eventually, Elm plants with winged-seeds accumulated sufficient genetic differences to prevent interbreeding, leading to the formation of a separate species.

4 0
3 years ago
How contour farming can solve <br> two environmental problems.
jasenka [17]

Answer:

1. reducing soil erosion,

2.Controlling runoff water

Explanation:

Contour farming mitigates the impacts of floods, storms and landslides on the crops by reducing soil erosion up to 50 percent, controlling runoff water, increasing moisture infiltration and retention and thus enhancing soil quality and composition

3 0
3 years ago
Roundworms are<br><br> A.Acoelomates<br> B.pseudocoelomates<br> C.coelomates<br> D.none of the above
ollegr [7]
The answer would be A. Im sorry if its wrong

3 0
3 years ago
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