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vladimir1956 [14]
3 years ago
10

Why can only traits controlled by genes be acted upon by natural selection?

Biology
1 answer:
Luda [366]3 years ago
5 0
Traits controlled by genes can only be acted upon natural selection because they have to helpful to the survival of that organism.
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In eukaryotic cells, the message from the DNA must be removed from the nucleus before it can be read and used to make proteins.
Veronika [31]

Answer:

Protein production in prokaryotes begins even before the completion of transcription. This means that ribosomes attach to the mRNA being generated even before transcription process is terminated. Therefore translation occurs in concurrence with transcription. This is because there is no definitive boundary between the nucleoid and cytoplasm.

In eukaryotic cells, the nucleus is separated from the cytoplasm by the nuclear membrane. This means transcription has to complete before the translation of proteins occurs. This is because the ribosomes are located in the cytoplasm while the DNA is in the nucleus.

This difference is part of the reason prokaryotic cells are able to respond really fast to an environmental stimuli as compared to eukaryotes. Remember in addition mRNA in prokaryotes do not need splicing (as required in eukaryotes) adding to quick protein production.  

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3 0
3 years ago
Why do scientists belive that tectonic active is not accurring on the moon.
Roman55 [17]
<span>Scientists believe that tectonic activity is not occurring on the moon. This is <span>because the moon lacks radioactive decay. The moon is not constantly supplied heat and energy from decaying unstable isotopes like Earth. Also, Earth is heated by the original heat during its formation. Since the moon was most likely broken off from earth, it lacks this central heat. @Kb0812    Hope this helps and if your feeling generous feel free to leave a rate, thanks and brainliest because it would really help me reach expert and I would appreciate it ;)</span></span>
5 0
3 years ago
o what temperature in oC must a 0.500 mole sample of O2 gas be adjusted in order to achieve a pressure of 4.00 atm in a 4.25 L c
Nesterboy [21]

Answer:

141C

Explanation:

We need to use the ideal gas law to solve this question. Ideal gas law: PV = nRT

P = pressure = 4.00 atm = 4.00 × 101.325 = 405.3 kPa (pressure needs to be converted to kilopascals)

V = volume = 4.25L

n = number of moles = 0.500

R = gas constant = 8.314 mol/K (found om chemistry data sheet)

T = temperature = ? unknown

Before any other steps are taken, we need to rearrange the the ideal gas law formula to make T the subject.

PV/nR = T

Now we can substitute the values.

(405.3 × 4.25) ÷ (0.500 × 8.314) = 414.3673322107 (answer in kelvin)

Convert 414.3673322107 Kelvin to Celsius.

0C = 273.15K (found on chemistry data sheet)

414.3673322107 - 273.15 = 141.2173322107C

141.2173322107 to nearest C = 141C

5 0
2 years ago
Bonds between animo acids are what type of bonds?
Zolol [24]

The bonds between amino acids are PEPTIDE chemical bonds (Option B).

<h3>What is a peptide bond?</h3>

A peptide bond is a special type of chemical bond between adjacent amino acids in a polypeptide chain.

Peptide bonds are known to be formed by a chemical process called dehydration synthesis.

In conclusion, amino acids bind by PEPTIDE chemical bonds (Option B).

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6 0
2 years ago
Which of the following is NOT true about essential body fat?A.The human body would not function normally without essential body
alina1380 [7]

Answer:

C.The percentage of essential body fat is the same for both males and females.

Explanation:

Among the given statements, only C is incorrect. Typically, on average, women have 5-12% more body fat than men. This has been mainly linked with the female hormones (e.g. oestrogen). Firstly, women can store more fat in their bodies due to the presence of excessive adipose tissues. Secondly, they are suppose to carry a child at some stage of their life, so a better food supply and protection is necessary.

On the other hand, rest of the options are true. Essential body fat is always required by body. It accounts for 3% of total body wight. And, it can be found in organs, bones and muscles at different percentages.

6 0
3 years ago
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