BIOLOGY HIGH SCHOOL

Scientists have been experimenting with gene therapy, which often involves the use of bacteria or viruses to deliver new or modified genes to cells. These scientists believe gene therapy can be used to treat inherited diseases, but it is not yet in wide use even though many people have studied it. Which statement best describes gene therapy?

Answers

Answer 1
Answer: The correct answer should be something like: "Gene therapy involves the use of bacteria or viruses to deliver new or modified genes to cells". That is what can be concluded based on the paragraph you provided.
Answer 2
Answer:

Answer:

Gene therapy is the introduction of normal genes into cells in place of missing or defective ones in order to correct genetic disorders. which often involves the use of bacteria or viruses to deliver new or modified genes to cells.

Researchers are testing several approaches to gene therapy, including:

  • Replacing a mutated gene that causes disease with a healthy copy of the gene.  
  • Inactivating, or “knocking out,” a mutated gene that is functioning improperly.  
  • Introducing a new gene into the body to help fight a disease.

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While on a dig, a paleontologist finds two fossils. The more deeply buried one is an animal that appeared to have a few spiky projections resembling feathers. The second is an imprint of an animal that had fully formed feathers like those of modern birds. The paleontologist suspects the first animal was an ancestor of the second one. What would be the best thing for him to do next to test his hypothesis?Look for fossils of more advanced forms in the rock layers above the second fossil.
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Answers

Answer:

Look for other fossils of transitional forms in the rock layers between the two fossils.

Explanation:

correct on my quiz
The second is an imprint of an animal that had fully formed feathers like those of modern birds. The paleontologist suspects the first animal was an ancestor of the second one. What would be the ... The more deeply buried one is an animal that appeared to have a few spiky projections resembling feathers.

A student states that organisms that reproduce asexually are at a disadvantage in an unstable environment do you agree or disagree explainI dont know some one help please (;

Answers

Organisms that reproduce asexually have less chances for genetic mutation and genetic drift, meaning that if something is introduced into the environment that causes the organism to be unable to survive, it wont have a variation that might make it possible to live.
If they reproduce asexually, there is no way the parent has a genetic illness and the son doesn't have it (unlike those that reproduce sexually). Plus the reason shown by Moley :)

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Answers

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Answers

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Sponges have a _____ that squeezes out waste.

Answers

Sponges have a Contractile vacuole that squeezes out waste

it's a type of membrane that regulate/control the osmotic pressure of the sponge, which will also periodically throw out it's waste

hope this helps
Sponges have a _____ that squeezes out waste.

Answer: Sponges have a contractile vacuole that squeezes out waste. A contractile vacuole is a membrane-surrounded cavity in a cell that periodically expands, filling with water, and then suddenly contracts, expelling its contents to the cell's exterior.

I hope it helps, Regards.
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