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3 years ago

The purpose of the science of classification is to:

Biology

1 answer:

Alborosie3 years ago

7 0

Answer:

The correct answer will be option A.

Explanation:

Humans in history have always tried to organize the diversity of organism based on a number of characters like ecological functions, habit, habitat and others based on the similarities and dissimilarities.

The traditional way of classification has classified the organisms based on the morphological characters but the modern concept of a classification approach to classify the organism based on their evolutionary relationship as a grouping in this way not only organizes the animals but also conveys the information about the understanding of their evolution and evolutionary history.

Thus, option A is the correct answer.

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Answer:

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Which best represents the role of the cell cycle in repair of an organism? an active cell cycle from a puncture wound an active

anygoal [31]

Answer:

The cell cycle best repairs organism from a puncture wound.

Explanation:

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3 years ago

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garri49 [273]

Answer:

1. The difference between the normal hemoglobin protein DNA sequence and the sickle cell hemoglobin DNA sequence is a base to base shift, in this case adenine (GAG) to thymine (GTG).

2. The difference affects the amino acid sequence of the protein by replacing glutamic acid (Glu) with valine (Val).

Explanation:

In sickle cell anemia, a change in the DNA nucleotide sequence is observed, where adenine is substituted by thymine, whose expression is the change in the amino acid sequence of globine β, incorporating valine instead of glutamic acid. This represents a molecular mutation - point mutation - by subtitution, which corresponds to missense mutation.

Normal hemoglobin protein in a RBC

DNA CTG ACT CCT GAG GAG AAG TCT

Amino acids Leu Thr Pro Glu Glu Lys Ser

Sickle cell hemoglobin protein in a RBC

DNA CTG ACT CCT GTG GAG AAG TCT

Amino acids Leu Thr Pro Val Glu Lys Ser

When GAG is transcribed to mRNA, the CUC codon is obtained, which codes for glutamic acid. Thymine substitution causes the DNA sequence to change to GTG, which is transcribed as CAC, the codon that encodes the amino acid valine. The change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease.

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3 years ago

(20 POINTS)

Dafna1 [17]

Correct answer looks like to me would be A. Because, if a sunflower has 34 chromosomes, when you split it up into x and y chromosomes, there will be 17 x chromosomes and 17 y chromosomes. Hope this helps!

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