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VARVARA [1.3K]
3 years ago
9

Is a cell membrane more like a brick wall or a chain-link fence? Why?

Biology
2 answers:
RideAnS [48]3 years ago
8 0

Answer:chain-link fence

Explanation:a cell membrane is partial permeable which means that it lets some substances through but not other.

Fantom [35]3 years ago
8 0

Answer:

Chain-link fence

Explanation:

Cell membranes are barriers that decide which molecules enter and exit the cell, and how much of them come in. So things are able to pass through them.

If it were a brick wall, it would not let anything pass through.

So it is more like a chain-link fence, but with more control over what passes through it.

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1. Which male, must<br> be the biological<br> parent of this<br> offspring?
NeX [460]

The father of this offspring should be male 3. It is the only individual that exhibits certain molecular genetic markers present in the offspring but absents in the mother.

<h3>Genetic markers</h3>

A molecular genetic marker is a fragment of DNA that can be used to trace the inheritance pattern from parents to offspring.

In this case, parents and offspring exhibit three molecular markers which are shared among them.

There are certain genetic markers that are present in the offspring but they are absent in one of the parents, and therefore they can be used to trace the inheritance pattern.

Learn more about genetic markers here:

brainly.com/question/7485649

5 0
2 years ago
PLEASE HELP IT IS FOR BIOLOGY!!!!!!!
Sladkaya [172]

Answer:

nucleotides

Explanation:

RNA and DNA are polymers made of long chains of nucleotides.

7 0
3 years ago
A researcher is using a modified version of FRAP. She has devised a technique that allows her to label all the peripheral membra
asambeis [7]

Answer:

The correct answer is option B.

Explanation:

FRAP or Fluorescence Recovery After Photobleaching refers to a method of finding the kinetics of diffusion in living cells, generally with the assistance of fluorescence microscopy. The method comprises the labeling of a particular cell constituent with a fluorescent molecule, imaging that cell, photobleach a small section of the cell, then image the recovery of fluorescence with time.  

In the given question, as the fluorescence has recovered back to the bleached region. The scientist can come to the conclusion that the membrane of the cell and the peripheral membrane proteins do not always belong together.  

3 0
3 years ago
Which of the following samples has the greatest population density?
Andrews [41]

The right answer is D.

The density of a given population is calculated by dividing the number of inhabitants by the area expressed in km² (or in hectares).


Number of inhabitants ÷ area (in km²) = number of inhabitants / km²



A = 125000 organism/ 2.5 m2 = 50,000 organisms / m2


B = 13000 organisms / m2


C = 37500 organisms / m2


D = 200000 organisms / m2

8 0
3 years ago
Read 2 more answers
PLEASE HELPPP ANSWER NEEDED ASAP
Viefleur [7K]
Here’s your answer, Enzymes !!
5 0
3 years ago
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