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2 years ago

Urine is made of _________

Biology

1 answer:

scZoUnD [109]2 years ago

6 0

Answer:

Answer is A

Explanation:

Urea consists of carbon, nitrogen and oxygen. You can find it in urine, sweat, blood and milk in mammals. In its most concentrated form, it is urine. Urea is a crystalline compound, and the nitrogen content is always at least 46 percent when dry.

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Find beryllium (Be) on the periodic table. In the space below, draw a Bohr model of beryllium atom.

lbvjy [14]

Make a electron cloud and put 2 dots on the first layer and 7 on the outer layer

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3 years ago

Why do we add isopropyl alcohol to the tube of DNA, and what is the result?

Vilka [71]

Answer:

To achieve precipitation of the DNA.

Explanation:

Isopropyl alcohol makes the DNA sediment. The DNA, once out of the solution, becomes visible, as it clumps.

The result of adding isopropyl alcohol is the precipitation or sedimentation of DNA when DNA becomes like a visible thread with the help of alcohol and salt. The precipitation of DNA is important because it removes the dirt from DNA.

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2 years ago

What is the only crainial nerve that enters and leaves the skull?

Pavel [41]

Answer:

The answer is the accessory nerve.

Explanation:

We have 12 pairs of cranial nerves, the accessory nerve is the XI pair. This is responsible for the innervation of the sternocleidomastoid and trapezius muscles.

The fibers of the accessory nerve originate from neurons that are located in the upper spinal cord. These fibers join together forming roots and once the nerve is constituted, it enters the skull through the great hole that is located at the base of the skull.

Then, the nerve continues its path along the inside of the skull in the direction of the jugular hole and then leaves the skull next to the glossopharyngeal nerve (IX) and the vagus (X).

Thus, the accessory nerve enters and leaves the skull again, characterized by being the only cranial nerve which has this behavior.

3 0

2 years ago

Read 2 more answers

In chemistry class we learn the rule "like dissolves like" when studying why polar substances dissolve in each other (like sucro

Lyrx [107]

<h2>The correct answer is: d.</h2>

Explanation:

As per the question, the correct answer is to be chosen from the given options that is identical to the logic given in the statement of the question that is, "like dissolves like".
Polar molecules can get dissolved in water because they are hydrophilic or water-loving in nature. They have such functional groups in their structure which have the capability of forming hydrogen bonds with water molecules, hence get dissolved in water.
Non-polar molecules can get dissolved in non-polar solvents like fats and oils because either of them are hydrophobic or water-hating in nature. They have such functional groups which can form hydrophobic and Van-der-Waal's forces of interaction with each other , hence they get dissolved in non-polar solvents.
Polar and non-polar substances are unable to get dissolved in each other because the polar molecules are incapable forming hydrophobic or Van-der-Waals forces of interaction with the non-polar molecules and the non-polar molecules are incapable of forming hydrogen bonding with the polar molecules.
Trans-membrane proteins are those which remain integrated in the lipid bilayer of the plasma membrane and spans across the membrane forming a connection between the cell interior and the cell exterior.
They are required for transporting small polar molecules and ions across the plasma membrane.
The lipid bilayer of the plasma membrane is otherwise impermeable to the movement of polar molecules and ions due to the hydrophobicity of the lipid molecules.
The trans-membrane proteins are amphipathic molecules, that is, they are made up of both polar and non-polar amino acid residues.
These amino acid residues are such arranged in the structure of the proteins that the non-polar amino acids face towards the lipid molecules in the bilayer thereby forming hydrophobic and Van-der-Waals forces of interaction with the lipid molecules.
The polar amino acids face towards the channel or lumen formed by the protein across the lipid bilayer so that they can form hydrogen bonds with the polar molecules and ions which are transported across the plasma membrane.
Hence, like interacts with like.

8 0

2 years ago

Which of the following is true about nucleic acids

Ierofanga [76]

Answer:

b. is the answer

Explanation:

Both DNA and RNA are both nucleic acids

3 0

2 years ago

Urine is made of _________​

Urine is made of _________