Hemoglobin is a protein found in the red blood cells of vertebrates and in the plasma of many invertebrates. The function of this protein is to transport oxygen throughout the body and to bring carbon dioxide back to be expelled from the organism. If the amino acid sequence of the protein is altered, the mutated protein is not as efficient as carrying oxygen as in the normal hemoglobin. Which argument is supported by this information? * 4 points
a. The mutated hemoglobin protein can still carry carbon dioxide to be expelled from the organism
b. Hemoglobin must be a simple molecule because it is found in both vertebrates and invertebrates.
c. Structural changes of hemoglobin affect its ability to carry oxygen, indicating that the shape of a protein is important to its function
d. Normal hemoglobin must be a larger molecule than the mutated hemoglobin since it has sufficient space to attach to and to carry both oxygen molecules and carbon dioxide molecules.

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Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.