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ioda
2 years ago
13

Limpids, proteins, polysaccharides, and nucleic acids are large polymers that make up different components of our bodies. Which

element can be found as the back bone of all of these macromolecules? A. Nitrogen B. Oxygen C. Phosphorus D. Carbon. The answer is D. Carbon. I had this question on an assignment.
Biology
1 answer:
sweet-ann [11.9K]2 years ago
8 0

Answer:

the answer is D

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How does lung volume control inspiration?
Nesterboy [21]
An increase in volume DECREASES the pressure in the chest (pressure and volume vary inversely when temperature is held constant -- Boyle's law). Gas can only flow from an area of higher pressure to an area of lower pressure. It can't go uphill -- ever. It can only go from high to low pressure. When the diaphragm and intercostals contract, the diaphragm flattens and the rib cage rises. That increases the volume of the chest. That increase in volume decreases the pressure inside the chest (temperature is held constant -- because the temperature of the chest cavity does not change appreciably. It remains at body temp.). Air then flows from the area of higher pressure (atmospheric) to lower pressure (intrathoracic). That continues until the pressures are equal.

When the diaphragm and intercostals relax, the chest cavity decreases in size, the pressure increases to above atmospheric, and gas flows again from the area of higher pressure (intrathoracic) to lower pressure (atmospheric) until they are again equal.

It has nothing to do with the concentration of oxygen. You can ventilate a lung with ANY gas. It has to do with the change in pressure and only the change in pressure -- which is a function of the volume of the chest cavity.
3 0
3 years ago
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Calculate the net force on the Fx and Fy<br> of<br> 20 N<br> 17 N<br> 45.50<br> 250
marysya [2.9K]

Answer:

F_{net} is 26.25 N

Explanation:

Given that: F_{x} = 20 N, F_{y} = 17 N.

This implies that the two forces are acting at right angle to each other. Thus applying the Pythagoras theorem, we have;

F_{net} = \sqrt{F_{x} ^{2} + F_{y} ^{2}  }

       = \sqrt{(20)^{2} + (17)^{2}  }

       = \sqrt{400 + 289}

F_{net} = \sqrt{689}

      = 26.2488

F_{net} = 26.25 N

The net force is 26.25 N.

3 0
2 years ago
Which of the following is not a form of mass communication?
Ksenya-84 [330]

Answer:

D .job interview...........

6 0
3 years ago
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If the relative humidity of the air is 50 percent, how much water can the air hold?
zlopas [31]
It depends on the tempature but at 100% that means it is raining  so D.
6 0
3 years ago
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Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offsprin
Andrei [34K]

Answer:

The correct answer would be 2 in 4.

According to the question Xo and XO show codominance and express themselves completely when present in heterozygous condition. Cats bearing XoXO show patchwork of black and orange fur and are called tortoiseshell cats.

Xo codes for orange color fur and XO codes for black color fur. In addition, Y chromosome does not contain any gene associated with fur color.

Now, genotype of mother cat is XOXO (orange fur). So, the gametes formed would be XO only.

The genotype of father cat is XoY(black fur). So, the gametes would be Xo and Y.

The cross would lead to the formation of two male cats each having XOY as their genotype and two female cats each with XOXo as their genotype.

Hence, both the male cats would show orange fur and both the female cats would show patchwork of orange and black fur.

Therefore, we can conclude that 2 out of 4 would exhibit tortoiseshell coloring.

3 0
3 years ago
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