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Biology

1 answer:

butalik [34]3 years ago

6 0

Answer:

Explanation: First off, people with CO often receive supportive care to relieve symptoms. The FDA has approved of some other tactics such as a medical D to treat CO patients. Secondly, the equipment used on people with CO is often a mask and a respirator. Hope this helps.

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in order for natural selection to take place, we must have a.one individual b.a cloned species c.the same traits d.variety in a

padilas [110]

Natural selection can only occur because of a variety in a population. Natural selection refers to environmental factors that affect a population and causes some of the population to have more surviving offspring than others. An example is a giraffe with a longer neck will be more likely to survive and reproduce (as it can gather more food from taller trees)

3 0

3 years ago

When egg white is heated, it hardens and is opaque. This cooking process cannot be reversed, but hard-boiled egg white can be di

marshall27 [118]

Answer:

Generally proteins are denatured at high temperature.Therefore when the egg is hard boiled they are denatured since eggs are protein, the 3-dimensional structure of protein is lost, and it is replaces with tangled meshwork of polypeptide chains .This is because the orderly arrangements of disulphide bonds in proteins are disrupted , which results in the formation of inter chains bonds among disulphide bonds, making the protein molecules to link together.This explains the reason for the 3-D structure disruption and formation of a macro molecule.

However, the addition of reducing agent , breaks the covalent disulphide bonds. While detergent breaks the interchain bonds among the disulphide bonds. (The noncovalent bonds),These combined effects untangled the mesh networks of polypeptides formed, and reduces the hardened nature,

Explanation:

5 0

3 years ago

On average, activated yeast cells divide once every 120 minutes; that is, each individual cell divides into two individual cells

astra-53 [7]

Answer:

The correct answer is 4,960,000

Explanation:

If a yeast cell divides into two yeast cells in 120 minutes that means a yeast cell needs 2 hours to get double. So according to the question 2 hours ago a yeast colony consisted of 310,000 cells that means the present colony should have 620,000 cells.

So after six hours from now, this population will divide three times in six hours because the generation time of yeast cell is 2 hour and each time the number of cells will double.

Therefore, in first time the number will increase to 1,240,000(620000*2), the second time the number will increase to 2,480,000(1240000*2) and after final division, the number will be 4,960,000(2480000*2).

Therefore after 6 hours from now, the approximate number of yeast cells will be 4,960,000.

3 0

3 years ago

O2 and CO2 can cross a lipid bilayer using what transport method?

grigory [225]

Diffusion is used. Diffusion is one principle of moving of cells

6 0

4 years ago

Which type of solution will cause cells to swell, or even to burst?

Inga [223]

Answer:

(b) Hypotonic solution

Explanation:

Any solution having lower osmotic pressure as compared to another solution is called as a hypotonic solution and the reason that a solution is hypotonic is that it has more water and lesser dissolved solute in it.
If a cell is placed in a hypotonic solution, the amount of water content in the cell would be lesser as compared to that of the solution and hence, the water will enter the cell due to which the cell will swell and may even burst.
The water molecules can enter the cell through the semipermeable membrane and in case of plant cells, the presence of cell wall may prevent it bursting, however, the animal cells lack the cell wall and hence if kept in hypotonic solution for long these cells may burst.

4 0

3 years ago