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Reptile [31]
3 years ago
13

Which statement about the cell membrane is true? A.It contains cellulose and sugars that are involved in communication. B.It is

present in animal cells only.C. It is rigid and elastic for supporting the cell’s shape. D.It prevents harmful substances from entering a cell.
Biology
2 answers:
yKpoI14uk [10]3 years ago
7 0

Answer:

I can confirm that the answer is:

D. It prevents harmful substances from entering a cell on the Edgenuity Quiz. :)

Serggg [28]3 years ago
5 0
I think it's D, because the purpose of the membrane is to regulate what enters and comes out of the cell. 
You might be interested in
Mars had an orbital period of 1.88 years. In two or more complete sentences,explain how to calculate the average distance from m
Vanyuwa [196]
This is an interesting problem involving astronomy, in fact, simple physics.
Let r=distance of sun to mars, in metres

<span>Mars had an orbital period of 1.88 years.
=>
tangential velocity, v, of the planet, in m/s is
v=\frac{2\pi{r}}{T}
</span>=\frac{2\pi{r}}{1.88*365.25*86400} m/s, accounting for leap years
=3.371*10^{-8}\pi{r}   m/s

The centripetal force, Fc, generated is
Fc=\frac{mv^2}{r}   
        where m=mass of mars = 6.39*10^(24) kg
=\frac{mv^2}{r}
=\frac{6.39*10^{24}v^2}{r}
=7.26168*10^9\pi^2r

The gravitation pull from the sun, Fg, is given by
Fg=\frac{GMm}{r^2}
    where G=grav. const., =6.67408*10^(-11) m^3<span> kg^(</span>-1)<span> s^(</span>-2)
              M=mass of sun=1.989*10^(30) kg
=\frac{6.67408*10^{-11}1.989*10^{30}6.39*10^{24}}{r^2}
=\frac{8.4826*10^44}{r^2}

Since the radial distance is in equilibrium, the average distance, r can be found by equation Fc=Fg and solving for r:
Fc=Fg
=>
7.26168*10^9\pi^2r=\frac{8.4826*10^44}{r^2}
Solving for the real root:
r^3=\frac{8.48256*10^44}{7.26168*10^9*%pi^2}
=\frac{1.1681263*10^{35}}{\pi^2}
=2.279*10^11 m


5 0
3 years ago
All cells come from living things. True or false?
Alenkasestr [34]

Answer:

True

Explanation:

4 0
3 years ago
What is diastole? what is systole?
GaryK [48]
Diastole<span> is the part of the cardiac cycle when the heart refills with blood following </span>systole<span>(contraction). Ventricular </span>diastole<span> is the period during which the ventricles are filling and relaxing, while atrial </span>diastole<span> is the period during which the atria are relaxing.</span>
7 0
4 years ago
Read 2 more answers
The junction type that lets neighboring cells exchange small molecules is the
olya-2409 [2.1K]

Answer:

Gap junctions.

Explanation:

Gap junctions may be defined as the intercellular connection present between the cells of the animals. They are made of the connexons and present in all cells of the body except skeletal muscles.

The small molecules and ions can easily pass through the gap junctions. The neighbouring cells can pass the molecules and communicates with each other through the gap junctions. They are known as  macula communicans. Invertebrates have the gap junction made of innexin.

Thus, the answer is gap junctions.

3 0
3 years ago
Which type of mutation would be more detrimental to an organism, germline or somatic?
ELEN [110]

Hope this helps!

https://www.nature.com/scitable/topicpage/genetic-mutation-1127

5 0
3 years ago
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