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4 years ago

What is the relationship between DNA mutation and sickle-cell anemia? (1 point)

Biology

1 answer:

Likurg_2 [28]4 years ago

4 0

Answer:

A DNA mutation causes sickle-cell anemia.

Explanation:

Sickle cell anemia is caused by a single code letter change in the DNA. This in turn alters one of the amino acids in the hemoglobin protein. Valine sits in the position where glutamic acid should be. The valine makes the hemoglobin molecules stick together, forming long fibers that distort the shape of the red blood cells, and this brings on an attack.

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The bone that is situated next to the eardrum is called the __________; the bone that sits next to the oval window is called the

EastWind [94]

The bone that is situated next to the eardrum is called the malleus.

The bone that sits next to the oval window is called the stapes.

Given,

The bone that is situated next to the eardrum is called the __________; the bone that sits next to the oval window is called the __________.

We need to fill in the blanks.

<h3>What are eardrums and their parts?</h3>

The eardrum is a transparent gray membrane and there is a middle ear

bone called the malleus attached to the center part of the drum.

The space inside the ear drum is called the middle ear.

The three smallest bones of the body are found in the middle ear.

They are:

- The hammer (malleus)

It is attached to the eardrum.

- The anvil (incus)

It is in the middle of the chain of bones.

- The Stirrup (stapes)

It is attached to the membrane-covered opening that connects the middle ear with the inner ear (oval window)

Thus

The bone that is situated next to the eardrum is called the malleus.

The bone that sits next to the oval window is called the stapes.

Learn more about identifying the functions of parts of the ear

here:

brainly.com/question/13275697

#SPJ4

7 0

2 years ago

You place an inoculum of your bacterium on a glass slide and add a drop of hydrogen peroxide reagent. Promptly you see bubbles a

marissa [1.9K]

Answer:

The correct answer is A) Biochemical test

Explanation:

In microbiology biochemical test is used to examine the metabolic activities performed by bacteria to identify that microorganism. So in biochemical test enzymatic reaction of cell is usually investigated because there is difference in enzymatic activity of different species of bacteria.

For example, catalase test that is used to differentiate between catalase-positive and catalase-negative bacteria is an example of biochemical test. Catalase-positive bacteria have the catalase enzyme that breaks hydrogen peroxide into water and oxygen which is confirmed by bubbles that appear on glass slide.

Catalase negative bacteria do not form bubbles when they are put in hydrogen peroxide which shows that they lack catalase enzyme. So the right answer is A.

5 0

3 years ago

Help me answer these questions plz!

Sergio039 [100]

For #1, the answer is A) Ribosomes.

3 0

3 years ago

Read 2 more answers

Clay and other materials through which water cannot readily pass are

ale4655 [162]

The answer is C or B.

If it was permeable water and other substances could get through.

And hard? That is one of those answer choices teachers throw in to try and make an obvious elimination choice.

I hope I have helped!

8 0

3 years ago

Which of the choices below is the main producers in the aquatic environment? a. phytoplankton b. zooplankton c. kelp d. fish

Minchanka [31]

I think the correct answer from the choices listed above is option A. The main producers in the aquatic environment is the phytoplankton. They are the base of several aquatic food webs. They provide food for many marine animals. Hope this answers the question.

3 0

3 years ago