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Ainat [17]
2 years ago
13

Part of the esophagus that is farthest from its beginning at the throat is the ____ end

Biology
1 answer:
marysya [2.9K]2 years ago
6 0

Answer;

-Distal end

Explanation;

-The part of the esophagus that is farthest from its beginning at the throat is the distal end.

-The esophagus is a muscular tube connecting the throat with the stomach. It is about 8 inches long, and is lined by moist pink tissue called mucosa.

-Both ends of the esophagus are closed off by muscular constrictions known as sphincters; at the anterior, or upper, end is the upper esophageal sphincter, and at the distal, or lower, end is the lower esophageal sphincter.

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By what amount did carbon dioxide in Earth’s atmosphere increase between 1960 and 2000?
zlopas [31]

Answer:

The answer is C.

6 0
1 year ago
Which of the following genes would not likely be encoded on a plasmid?
raketka [301]

Answer:

gene encoding enzymes for glycolysis.

Explanation:

Plasmid may be defined as an extra chromosomal circular DNA that replicate independently of the main chromosomal material. Plasmid are generally used for the manipulation of genes in molecular technologies.

Plasmid can encode gene for toxins, antibacterial resistance and for the unusual substrate degradation. The plasmid cannot code enzyme for glycolysis because these enzymes are already present in the host organisms. Glycolysis enzymes are independent on the plasmid regulation.

Thus, the correct answer is option (3).

7 0
2 years ago
Growth hormone and insulin are protein hormones that regulate carbohydrate metabolism by hepatocytes (liver cells) through the a
Yanka [14]

Growth Hormone and insulin are protein hormones that promotes the growth and regulation of substrate metabolism.

Explanation:

The Growth Hormone performs the metabolic actions in various tissues like liver, muscle, and pancreas through insulin growth factor. Insulin slows down the growth hormone signalling through the growth hormone receptor. It is important for maintaining the responsiveness of liver to growth hormone.

The insulin signalling pathway is very important in metabolic diseases like diabetes and aging. These insulin activates a phosphorylation cascade that branches to form a network affecting multiple biological processes.

5 0
2 years ago
A child with cystic fibrosis has an altered protein in his cells that stops chloride ions from leaving the cells. This protein m
Juliette [100K]
The  altered  protein  affected  the  function   of  the  cell  membrane. The   cell  membrane which  contain  a  bilayer control  the  movement  of  substance   in  and  out  of  the  cell and organelles.  Due   to  this  it  is  selective  permeable  to ion  and  organic  molecules.
8 0
2 years ago
Read 2 more answers
In humans, Rh-positive individuals have the Rh antigen on their red blood cells, while Rh-negative individuals do not. If the Rh
Marta_Voda [28]

Answer:

D. 0.60

Explanation:

If the population is in Hardy-Weinberg equilibrium, the genotypic frequencies are:

  • freq AA = p²
  • freq Aa = 2pq
  • freq aa = q²

<em>p</em> is the frequency of the Rh positive allele (A) and <em>q</em> is the frequency of the Rh-negative allele (a).

If 84% of the population is Rh-positive, then 16% is Rh-negative and has the genotype <em>aa</em>. Therefore:

q² = 0.16

q = √0.16

q=0.4

And because p+q=1,

p = 1 - 0.4

p = 0.6

The frequency of the Rh-positive allele is 0.6

3 0
1 year ago
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