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TiliK225 [7]
3 years ago
7

Because of the relatively high altitude of Antonito, Colorado, the town has a normal barometric pressure of about 600 mm Hg rath

er than 760 mm Hg as at sea level. The partial pressure of O2in Antonito’s air is approximately _______ mm Hg.a. 75.b. 126.c. 160.d. 76.e. 21.
Biology
2 answers:
Ksju [112]3 years ago
8 0

Answer:

126 mm Hg

Explanation:

the percentage by volume of oxygen in the air is 21%. Therefore it also contributes to the 21% of the total barometric pressure of the air.

Now, 21% of 600 mm Hg

=21/100*600= 126mm Hg

therefore The partial pressure of O2in Antonito’s air is approximately is 126 mm of Hg.

Natalija [7]3 years ago
7 0

Answer:

The correct answer is option b. 126

Explanation:

Hi! Let's solve this!

We have 21% oxygen in the air, the rest is mostly nitrogen (78%) and the remaining 5 are other gases. So:

The partial pressure of oxygen is 21% of 600 mmHg.

That is calculated as follows:

ppO2 = 600 * 21/100 = 126 mmHg

We conclude that the correct answer is option b. 126

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Which of the following statements about renewable energy resources is true?
Brilliant_brown [7]

The statement that is true about renewable energy resources is that there are endless supplies of all renewable energy resources (option B).

<h3>What is renewable energy resource?</h3>

Renewable energy is the energy that is collected from renewable resources such as;

  • wind power
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A renewable resource is that natural resource that is replenished by natural processes at a rate comparable to its rate of consumption by humans or other users.

This suggests that renewable resources have an unlimited supply and will likely not be exhausted. This is unlike the non-renewable counterparts like crude oil, gas etc.

Therefore, the statement that is true about renewable energy resources is that there are endless supplies of all renewable energy resources.

Learn more about renewable resource at: brainly.com/question/19604560

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4 0
1 year ago
Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"? Sel
Mila [183]

Answer:

Cyclic AMP and calcium may be second messengers.

Explanation:

these are signalling molecules that are located inside the cells,They are releases  when cells   are in contact with  signals from an extracellular molecule. the extracellular molecules that cause the chemical  reaction  in an external environment  in the second messenger are called first messenger.

<u>the basic mechanisms of second messenger involve the binding of ligands to the cell membrane receptors( usually a trans membrane protein).causing   conformational  change in the receptor protein. The latter change affect the structural and functional activities of the receptors protein with a consequent  production of second messenger,</u>

<u />

Response of the cells  to the first messenger my cause different form of cellular reactions; the cells may  undergo depolarization  with influx of out flux of ions, differentiate to specialized cells  or migrate to another location.

Examples of first messenger are hormones and neurotransmitters, while calcium ions, cyclic GMP,AMP, diaclyglycerol are examples of first messengers.

Most first messengers are peptide hormones.Some may be streroid, However, the hydrophilic nature of the peptide hormone restrict their movement, at the cell membranes. Therefore most first messengers made of  peptide  are first converted to second messenger to  bring about their signalling effects.The usually mark the beginning of cascade events by second messengers.

Second messengers are usually classified based on their polarity and molecular form this include the

<u> hydrophobic molecules</u> ;diacyglecerol,phosphatdylinotisols. These diffuse  through the membrane  into intramembrane space of cells cause signalling effects in the cell.

<u>the hydrophiliic  molecul</u>es  are  located in the cystol  of cells. Example are  Cylic AMP. GMP, Calcium,

N02, CO,H2S are <u>polar molecules</u> that easily diffuse into the cells to cause signalling effects, they are the third Classification of second messengers.

6 0
3 years ago
Read 2 more answers
You don't have to answer all of them but please answer some....thanks
ella [17]

Answer:

1.) DNA Fingerprinting- a positive out come of this is when some one commits a crime and leaves finger prints they can be used to find the person who committed the crime

8 0
3 years ago
Now that you have come up with an equation that describes the relationship between amounts of different nucleotide bases in DNA,
Colt1911 [192]

Answer:

G=21 %

T= 29 %

A= 29 %

Explanation:

Since C only binds to G, you have the same amount of C and G, so G is 21 %.

100 % minus 42 % ( 21 % C plus 21 % G=) equals 58 %.

So the other 58 % is made of T and A. Since T only binds to A , the half of the extra 58 % is T and the other half is A. Therefore 29 % is T and 29 % is A

4 0
3 years ago
There are 3 types of polar bears: ones with thick coats, ones with thin coats and ones with medium coats. It is fall, soon to be
Ratling [72]

Answer:

the one with the thickest coat will stay the warmest

Explanation:

5 0
3 years ago
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