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Juli2301 [7.4K]
3 years ago
13

In what way might transposons contribute positively to evolution?

Biology
1 answer:
Lubov Fominskaja [6]3 years ago
8 0
<span>Transposons are mobile elements that are very important in the evolution of the eukaryotic genome. </span> <span>For example, transposons are involved in the formation of introns. Evolution often deactivates DNA transposons via RNA interference, leaving them as <span>introns. They are also important in the production of antibody diversity via </span>V(D)J recombination <span>because the mechanism of this recombination is similar to that of some transposons (probably originated from it).</span> Another advantage of these mobile elements is in the formation of interspersed repeats within genomes which are created by transposition. Because interspersed repeats block gene conversion, they protect novel gene sequences from being overwritten by similar gene sequences.</span> <span>Transposons can contain many types of genes.</span>
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Starting from the mouth, describe the pathway that takes through the digestive system
bonufazy [111]
Food starts to move through your GI tract when you eat. When you swallow, your tongue pushes the food into your throat. A small flap of tissue, called the epiglottis, folds over your windpipe to prevent choking and the food passes into your esophagus.

Esophagus. Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins.

Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach. This sphincter usually stays closed to keep what’s in your stomach from flowing back into your esophagus.

Stomach. After food enters your stomach, the stomach muscles mix the food and liquid with digestive juices. The stomach slowly empties its contents, called chyme, into your small intestine.

Small intestine. The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion. The walls of the small intestine absorb water and the digested nutrients into your bloodstream. As peristalsis continues, the waste products of the digestive process move into the large intestine.

Large intestine. Waste products from the digestive process include undigested parts of food, fluid, and older cells from the lining of your GI tract. The large intestine absorbs water and changes the waste from liquid into stool. Peristalsis helps move the stool into your rectum.

Rectum. The lower end of your large intestine, the rectum, stores stool until it pushes stool out of your anus during a bowel movement.
7 0
3 years ago
Reverse genetics can be useful for: Question 4 options: Determining the function of a gene Forensic analysis Cloning desirable a
givi [52]

The molecular biology technique of reverse genetics can be useful for determining the function of a gene.

<h3>What is reverse genetics?</h3>

Reverse genetics is method use in molecular biology to determine gene function in an organism

The procedure in reverse genetics involves modifying or certain nucleotide sequences in the DNA coding for a functional gene and then observing changes to the phenotype of the organism brought about by the modifications.

Therefore, reverse genetics can be useful for determining the function of a gene.

Learn more about reverse genetics at: brainly.com/question/9896589

8 0
2 years ago
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Mrac [35]
It is Protozoa because it is not logical for it be any of the other. Hope this helped.
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3 years ago
Spontaneous generation does not support cell theory because
zepelin [54]
<h2>Answer</h2>

Spontaneous generation does not support cell theory because

  • <u>A. All cells arise from preexisting cells</u>

Correct me if I'm wrong

<h3>#CarryOnLearning</h3>

\mathfrak{WatanabeHaruto}

7 0
2 years ago
What does a centromere hold together?
Rudiy27

Answer:

Structure in a chromosome that holds together the two chromatids

Explanation:

8 0
2 years ago
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