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Veseljchak [2.6K]
3 years ago
10

I would love to be helped with this

Biology
2 answers:
Citrus2011 [14]3 years ago
5 0
It would be the 3rd option: Reaction to a stimulus helps maintain homeostasis.
Do you need an explanation? 
Vika [28.1K]3 years ago
5 0
Reaction to a stimulus helps maintain homeostasis

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Two sounds are described below:
kolezko [41]

Answer:

B

Explanation:

Low-pitched sounds don't vibrate a lot and their wavelengths are farther apart meaning the tops of the wave will be farther.

Also, this isn't a biology question. Have a good day.

5 0
3 years ago
Which of the following situations does diffusion not help, in our bodies?A. Oxygen entering the bloodstream.B. Food entering the
lubasha [3.4K]

Answer:

Glucose entering the intestines from the villus.This is by active transport.The latter is defined as the movement of molecules and  solutes from the region of lower concentration to the region of higher concentration against the concentration gradient.

Explanation:

All the above options depends on the diffusion gradients from one  higher region to another.e.g oxygen passing from high concentration from outside to lower concentration in blood stream,like wise Co2 from higher concentration from inside to outside,with passive diffusion lipids and water enter the small intestine(note amino acid and glucose,and fructose are different).

Active transport( through sodium dependent transporter) transports glucose to the intestine  from the villus.This is movements against concentration gradient because,glucose molecule are concentrated in intestine,and needed by the cells, in the body.Therefore they must be transported as a fast rate inn the blood .

However the absorption by the villi is very slow,therefore active transport is needed to move these against the concentration gradient into the intestine.And finally the blood.

If this were to be moved by  passive diffusion,the high concentration in the intestine will force this back into the villi

Therefore extra energy is needed by active transport for the glucose molecules to enter the intestine from the villus.

6 0
3 years ago
Small molecules that allow communication between cells of the immune system and regulate the growth or activation of white blood
Aleks [24]
Cytokines
Hope this helps
7 0
2 years ago
Which of the following nitrogen bases is unique to RNA?
Shkiper50 [21]
<h2>Answer</h2>

The right option is (A).

<h2>Explanation</h2>

The RNA gets its information from DNA to synthesise the proteins. It is different from DNA also due to the difference in one nitrogen basis as uracil. The thymine, the nitrogen basis that is only present in DNA is replaced with uracil to form RNA coding. The uracil also contains the same features as thymine has in DNA strains. Uracil makes a double H-bond with the adenine but does not contain CH4 group which is present in thymine.

4 0
3 years ago
Explain the structure of DNA and function of DNA.
prisoha [69]

Answer:

Explanation: DNA is the information molecule. It stores instructions for making other large molecules, called proteins. and the function of DNA is To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.

8 0
3 years ago
Read 2 more answers
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