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inn [45]
3 years ago
7

The frog population in the Amazon basin varied. Every 500 years, there was a mutational change leading to speciation. In between

, the population remained the same with no observable changes. What pattern of macroevolution determined this change?
Biology
2 answers:
soldi70 [24.7K]3 years ago
7 0
The answer is option "C", punctuated equilibrium
Ipatiy [6.2K]3 years ago
5 0
Punctuated equilibrium, it is rapid evolution with little change in between
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GarryVolchara [31]

Answer: the bloodtype of Jesse is A Rhesus D positive

Explanation:

Antigens at present on the blood cells while antibodies are present in the serum. Thus, to prevent agglutination which occurs if the red blood cell antigen is similar to the antibody, the red blood cell of Jesse which has the B antigen will have the A antibodies produced. Thus, since the red blood cell determines the bloodtype of a person, Jesse therefore has the B bloodtype.

3 0
3 years ago
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bixtya [17]

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Explanation:

Animals adapt to their environment because of their predators.

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3 years ago
Food examples of carbohydrates?help?
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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.

<u>Normal hemoglobin protein in a RBC</u>

DNA                 CTG ACT CCT GAG GAG AAG TCT

Amino acids     Leu  Thr   Pro   Glu   Glu   Lys   Ser

<u>Sickle cell hemoglobin protein in a RBC</u>

DNA                 CTG ACT CCT <em>GTG</em> GAG AAG TCT

Amino acids     Leu  Thr   Pro   <em>Val</em>   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 <u>change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease</u>.

6 0
3 years ago
HELP giving brainliest please explain yo answer
kotykmax [81]

Answer:C

Explanation:

Foreign leaders helped train and fought for the Continental Army

6 0
3 years ago
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