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Triss [41]
2 years ago
14

Discuss why prokaryotic cells probably appeared before eukaryotic cells​

Biology
1 answer:
dsp732 years ago
6 0

Answer:

Prokaryotes are smaller and less developed compared to eukaryotes. Some of them inhabit very primitive environments that resemble earth’s early stages. Endosymbiotic theory states that eukaryotes arose by the endosymbiosis of prokaryotes.

Explanation

By endosymbiont theory, eukaryotic cells arise from prokaryotic cells. Here, the theory shows that eukaryotic ancestors lived in close association with prokaryotes, wherein in some cases, prokaryotes have been engulfed and might have lived inside eukaryotes.

Upon being engulfed by a host cell as undigested prey, these prokaryotes could have been internal parasites of the eukaryotes. But, later on, their relationship becomes mutualistic and these prokaryotes become incorporated as organelles, such as in the case of chloroplasts and mitochondria, which were previously separate prokaryotes

______________________________________

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True because it makes since and it’s a better answer than false
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3 years ago
Question involving the equations for Hardy Weinberg equilibrium (A^2+2Aa+a^2=1, A+a=1)
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Answer:

Frequency of dominant allele is 0.9029

Explanation:

Total number of organisms = 12,845

Number of organisms representing dominant trait = 11,596. These organisms might have heterozygotes with one dominant allele and one recessive allele.

Hence, Number of organisms with recessive alleles = 12845 – 11596 = 1249

Frequency of recessive allele (q) = 1249/12845 = 0.0971

Frequency of dominant allele (p) = 1- q = 1-  0.0971 = 0.9029

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3 years ago
Which of these describes a difference between viruses and cells?​
OlgaM077 [116]
Viruses cannot reproduce. they instead copy themselves with the help of a host cell. a cell can reproduce and doesn’t need help from other cells
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3 years ago
Why is the shape of a protein so important?
shutvik [7]

Answer:

It Determines whether the protein can interact with other molecules

Explanation: Hope this Helps

4 0
3 years ago
All of the following protect the skin and mucous membranes from infection except
leva [86]

The question is incomplete. Th ecomplete question is as following:

All of the following protect the skin and mucous membranes from infection EXCEPT  

A) multiple layers of cells.

B) tears.

C) saliva.

D) HCl.

E) the "ciliary escalator."

Answer: D) HCl.

Explanation:

  • The epidermis, the outer layer of the skin provides waterproofing and serves as a barrier to infection and other laers also sustain any type of injury.  
  • Tears wash out foreign bodies which enter the eye. In addition, tears contain a substance called lysozyme which has an antibacterial function and works to prevent microbial invasion and infection.  
  • Saliva protects against infection, especially via the innate immune system. This mechanism is an important first-line protection against bacterial and viral infection
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Whereas HCL helps in the digestion process.

Hence, the correct option is D.

5 0
3 years ago
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