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damaskus [11]
3 years ago
8

Ipids contain the same three elements as all other macromolecules. Which other elements must your food contain so that your body

can make new nucleic acids?
A. Chlorine and sodium
B. Calcium and nitrogen
C. Phosphorus and sodium
D. Phosphorus and nitrogen
Biology
1 answer:
ioda3 years ago
3 0
The answer is D. Phosphorus and nitrogen
The three main elements are C, H and O. These two are elements other macro-molecules may not have
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Can someone help me i'm stuck on this question.
shusha [124]
Decomposers<span>  get </span>nutrients<span> and energy by </span>breaking down dead organisms<span> and animal wastes. </span>Through<span> this process, </span>decomposers<span> release</span>nutrients<span>, such as carbon and nitrogen, back into the environment. These </span>nutrients<span>are </span>recycled<span> back into the </span>ecosystem<span> so that the </span>producers<span> can use them.</span>
8 0
3 years ago
Read 2 more answers
The sole of a gecko's foot is covered with millions and millions of small, dry "hairs" that make direct contact with surfaces, a
tamaranim1 [39]

Answer: Van der Waals forces

Explanation:

Van der Waals forces are weak intermolecular forces that depend on the distance between two particles. They are caused by correlations in the change in polarization between two nearby particles. To put it in other words, when a particle changes its polarization (becomes more positive on one end and more negative on the other), so does the adjacent particle, and the next one, and so on. This causes these particles to stick together weakly.

The tiny "hairs" increase the surface area of the gecko's feet in contact with the wall, which makes the bond stronger and allows it to support all of its weight.

Because experiments have shown that geckos stick well to both hydrophobic and hydrophilic surfaces, we can assume there aren't any hydrogen bonds present.

Ionic bonds can't be present either because geckos wouldn't stick to electrically neutral surfaces, as these bonds require charged molecules.

6 0
3 years ago
Is water polar or nonpolar​
statuscvo [17]

Answer:

Polar

Explanation:

A water molecule, because of its shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom. The bonds between the atoms are called covalent bonds, because the atoms share electrons. The hydrogen atoms have one electron each.

6 0
3 years ago
Read 2 more answers
There is a healthy bacterial culture growing in the exponential phase . A technician wants to make a growth curve by making cell
emmainna [20.7K]

A) WHAT IS THE PROBLEM WITH HER PLAN?

Binary fission is one of the asexual process by which most bacteria reproduce, the binary fission brings about a doubling of the number in bacterial cells that are viable.

Generation time is that time that it will require for a cell population to divide and double, it is also known as doubling time. This Generation time varies among distinct organisms and also varies among culture conditions.

Take for instance,a fast growing bacterium that is under an ideal culture conditions has a doubling time of 20minutes and for the bacteria that is grown in a condition that is not so ideal,may have a doubling time of hours.

The major challenge/ problem with her plan is that as she takes the bacterial sample every 30minutes, and then hold the sample till the last sampling is done in the day,those bacterial cells that are collected in the initial intervals will then get divided and further gives a result that is false.

However,if those bacteria that are collected aren't stored in a culture environment that is standard,the bacterial cells may die off and thus will further bring about a false result.

2) CAN SHE DO ANYTHING TO IMPROVE THE ACCURACY OF HER RESULT?

Solution for rectifying the error in her plan;

She can go ahead and add 50-100 μl of formaldehyde to all the culture suspensions that she has and has taken every 30minutes.

As the formaldehyde will fix the bacterial cells,The optical density present in all those aliquots can then be retrieved/taken at the end of the day.

Looking at it alternatively, aliquot 1ml of the culture suspension at an interval of every 30 minutes,and then take the optical density that is OD at a wavelength of 600nm making use of spectrophotometer until the reason you get becomes static.

5 0
3 years ago
Pls help me I'm not good at this
padilas [110]
Warm air rises and eventually cools. Answer choice D.
3 0
3 years ago
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