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barxatty [35]
3 years ago
5

Apply your understanding of how the theory of evolution is supported by evidence by writing a letter to a skeptic explaining the

evidence for evolution
Biology
1 answer:
Leno4ka [110]3 years ago
8 0

Darwin used Multiple lines of evidence to support the theory of evolution by natural selection they are fossil evidence, biographical evidence and anatomical evidence.

Explanation:

The Multiple types of evidences supports the theory of evolution. The homologous structures provides the evidence for common ancestry and the analogous structures describes that similar selective pressures can produce similar adaptions.

Evolution by natural selection is one of the good method in theory of history of science and it is supported by evidence from wide variety of scientific disciplines.

The comparative sequence analysis method is used to examine the relationship between the DNA sequences of different species. This evolutionary relationships are used in the study of diseases like HIV.

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Enter the sequence of the DNA coding strand with a 5-3 polarity. DO NOT WRITE 5 OR 3 OR 5' OR 3' IN THE BOX!
Charra [1.4K]

Complete question:

Use the sequence below to answer the following questions  

3’-ACGGATCCTCCCTAGTGCGTAATACG-5’  

5’-TGCCTAGGAGGGATCACGCATTATGC-3’  

1. Enter the sequence of the coding strand with a 5’-3’ polarity

Answer:

coding strand → 5´- GCATAATGCGTGATCCCTAGGCA -3´

Explanation:

When referring to the <u>coding strand</u>, we are talking about the sequence that turns to be the same as the mRNA that results from the transcription of the same DNI segment -switching bases T for U-.  

The coding strand receives that name because it is the sequence that codes for each amino acid composing the proteins.

When the DNI molecule separates into two strands to form the transcription bubble, we can identify two separate segments: coding strand and template strand.  

The coding strand goes in direction 5´ to 3´, while the complementary strand -template strand- grows in direction 3´ to 5´.  

Whenever we have a DNI molecule and we need to determine which strand is the coding one, we just need to look for the presence/absence of start or stop codons.

So, in the exposed example we have two strands, but we do not know yet which one is the coding one.

Conventionally, the first strand is always the coding one. However, let us analyze it by using the presence/absence of codons.

First-strand:

3’-ACGGATCCTCCCTAGTGCGTAATACG-5’

let us write it is 5´to 3´direction

5´- GCATAATGCGTGATCCCTAGGCA -3´

now let us identify the start and stop codons in 5´⇒3´direction.

  • Start codon ⇒ ATG
  • Stop codon ⇒ TAA, TAG, TGA

5´- GCATA<u>ATG</u>CGTGATCCCTAGGCA -3´ ⇒ 1 start codon at the beginning

5´- GCA<u>TAA</u>TGCG<u>TGA</u>TCCC<u>TAG</u>GCA -3´ ⇒ 3 Stop codons

Second strand: We will do exactly the same procedure

5’-TGCCTAGGAGGGATCACGCATT<u>ATG</u>C-3’⇒ 1 start codon near the end

5’-TGCC<u>TAG</u>GAGGGATCACGCATTATGC-3’⇒ 1 stop codon at the beginning

What we did here was to identify in both provided strands, where the start and stop codons are placed. We can see that in the first strand we have the start codon near the beginning, while in the second strand we have it near the end of the sequence. From this information, we can assume that the first strand is the coding one. <em>However, you need to know that some coding sequences do not have start and stop sequences, because they might correspond to a sequence in the middle of a gene.</em>

So, the sequence of the DNA coding strand with a 5-3 polarity is

5´- GCATAATGCGTGATCCCTAGGCA -3´

8 0
3 years ago
///////WILL MARK BRAINLIEST///////////NEED HELP ASAP////////////////////////////
Andrei [34K]
I think it’s Density
6 0
3 years ago
How is a loss of biodiversity most likely to affect an ecosystem?
ki77a [65]
Loss of biodiversity affects the ecosystem in many ways. For example, if a species disappears, the animals/plants that it fed on will suddenly increase in population due to loss of predators. The predators of the lost species, however, will go down in population because its main source of food has disappeared.
3 0
3 years ago
Read 2 more answers
Voluntary control of skeletal muscles is provided by the
lord [1]

The correct answer is: b. corticospinal pathway

The corticospinal pathway is a motor pathway that  starts at the cerebral cortex and terminates on lower motor neurons and interneurons in the spinal cord. Its function is to control the movements of the limbs, directly and voluntary.

5 0
3 years ago
Which of the following is a step that occurs within an inflammatory response?
Citrus2011 [14]

The right answer is C.

During inflammation, under the influence of chemical mediators, endothelial cells (forming the blood vessels) become activated. This leads to local arteriolar vasodilation then capillary2 which causes:

** an increase in blood supply

** a decrease in the speed of blood flow

This local swelling of the blood vessels causes redness and the sensation of heat. It aims to increase the flow of blood to evacuate dead cells and toxins (detox) and provide the elements necessary for healing, including white blood cells to fight against foreign bodies.

8 0
3 years ago
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