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kumpel [21]
3 years ago
12

. Explain how the structure of the plasma membrane makes it selectively permeable. What kinds of substances can pass through the

membrane? What kinds of substances cannot pass through the membrane without the assistance of proteins?
Biology
1 answer:
Yuliya22 [10]3 years ago
6 0
The plasma membrane is made out of structures called phospholipids that form a phospholipid bilayer. The tails of the phospholipids are hydrophobic (water-hating) while their heads are hydrophilic (water-loving.

Because they are so tightly packed, large molecules such as glucose can’t get into the cell without the help of protein channels. However, non-polar molecules such as carbon dioxide and oxygen can easily pass through.
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Birds have a _____-chambered heart.<br> two<br> three<br> four
tester [92]
Birds, just like humans, have a four-chambered heart.
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3 years ago
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Describe an experiment to investigate the effect of training on subjects ability to run faster without respire get anaerobically
Zinaida [17]
A runner HAS to use the anaerobic respiration process,first we need to know the difference between anaerobic respiration and aeorobic respiration 

<span>Anaerobic respiration is done by burning glucose directly without the presence of oxygen giving out lactic acid and energy </span>
<span>Aerobic respiration is done by burning glucose and oxygen giving out water + engergy + Co2 </span>

<span>1.) Take a stop-watch </span>
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<span>4.) make the runners breath hard for air </span>
<span>5.) after finish line </span>
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5 0
3 years ago
In a species of bird, the allele for the striped trait is recessive to the allele for the speckled trait. Suppose that a coastal
mylen [45]

Answer:

The answer is "0.42"

Explanation:

Please find the complete question in the attached file.

Coastal community striped allele intensity = q = 0.62

Landlocked community, strip intensity allele=q'=0.40

Its eliminated allele frequency for movement = q"=0.42 \ in \ indoorscommunity And now in the sturdy vineyard optimum communities, genotype frequency of stripped characteristic (heterozygous device) in coasts=q_2=0.39

Heritable (striped) allele frecency:

\to q=\sqrt{q_2}

      =\sqrt{0.39} \\\\ =0.624 \\\\ =0.62

(round up to the closest cent) is therefore the only frequency of coastal people.

The genome of pulling function in host population= q'_2=0.16 Heterozygous feature regularly.

Therefore the inland community rate of recessed (striped), allele rate:

\to q'= \sqrt{q'_{2}}= \sqrt{0.16}=0.40

Following migration;

Its percentage of coastal migrants:

m=10\% \\\\

   = \frac{10}{100} \\\\= 0.1

Coastal population Non-immigrant percentage of coastal residents:

=1- m\\\\=1-0.1\\\\ =0.9

Stripping coastal community of allele rate after immigration:

(q")=\text{(stripping of migrant only freq)}\times (m)+\text{(stripping allele baud rate for non-immigrants)} \times ( 1-m)

       = [q \times m]+[[q' \times(1-m)]\\\\=(0.62 \times 0.1)+(0.40 \times 0.9)\\\\=0.062+ 0.36\\\\=0.422\\\\=0.42

8 0
3 years ago
When air has reached its dew point
olga55 [171]

Answer:

When air has reached the dew-point temperature at a particular pressure, the water vapor in the air is in equilibrium with liquid water, meaning water vapor is condensing at the same rate at which liquid water is evaporating.....

6 0
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Which of the following is NOT true?
mart [117]
NOT TRUE statement is <span>Both the genus and species are capitalized in binomial nomenclature.

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5 0
4 years ago
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