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Minchanka [31]
3 years ago
12

Fish respiratory systems exchange gas and receive oxygen at the gills. This oxygen then enters the bloodstream and is pumped thr

ough the heart and back through the gills without first returning to the heart. This order of events best describes which type of circulation system?
Biology
1 answer:
Arada [10]3 years ago
3 0

Answer:

Gas exchange between tissues and the blood is an essential function of the circulatory. The air contains oxygen that crosses the lung tissue, enters the bloodstream, and the alveoli are in direct contact with capillaries of the circulatory system. As water flows over the gills, oxygen is transferred to blood via the veins.

Explanation:

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Answer:

A) Bacteria cannot carry out RNA splicing to remove introns and so produced a much larger protein.

Explanation:

Human is a eukaryote and has both introns and exons in its genes. Transcription of human genes forms a primary transcript that undergoes post-transcriptional modification.

One of the important even during the post-transcriptional modification is the removal of introns and joining the exons together to make a mature mRNA which in turn serves as the template for protein synthesis.

<em>E. coli</em> is a prokaryote and does not have the enzymatic machinery required for the splicing of introns.

Cloning of a complete human gene into the <em>E. coli</em> cells would not form the respective human protein since the bacterial cells would not be able to splice the introns from the primary transcript.

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3 years ago
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Jacob skips, climbs ladders, and is able to change direction very quickly while running. his gross-motor skills are normative fo
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7 0
4 years ago
No stripe on the head (H) is dominant, a black stripe on the head is recessive. If dad's genotype is Hh, what are the odds that
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The chance of the offsprings with stripe on head is 50%.

Option A.

<h3><u>Explanation:</u></h3>

Here according to the figures, the male is the brown one which has no stripe on his head as mentioned, and the female is the pink one who has a stripe on her head. The gene for the head stripe is denoted by H.

So the genotype of the father which is given as Hh. He is heterozygous.

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3 years ago
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