What allows fetal hemoglobin to remove oxygen from maternal hemoglobin?
A. Fetal hemoglobin has an extra heme group.
B. Oxygen is more soluble in fetal blood than maternal blood.
C. Fetal hemoglobin has a higher affinity for oxygen than does maternal hemoglobin.
D. Fetal blood contains twice as many hemoglobin molecules than maternal blood.
E. Fetal hemoglobin molecules are much larger than maternal hemoglobin molecules.
C. Fetal hemoglobin has a higher affinity for oxygen than does maternal hemoglobin.
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Unlike members of the Bacteria, most archaeons have linear chromosomes with multiple origins of replication.
Answer the following statement true (T) or false (F)
Which of the following correctly describes the path of a drop of blood leaving the human heart?
A. heart arteries arterioles capillaries venules veins heart B. heart veins venules capillaries arterioles arteries heart C. heart arterioles arteries capillaries veins venules heart D. heart venules veins capillaries arteries arterioles heart E. heart arteries veins capillaries arterioles venules heart
Processed pseudogenes are useful for testing Darwin's theory of descent with modification because they ________
A) can be utilized for examining phylogenetic relationships among asexually reproducing organisms B) demonstrate phylogenetic relationships of divergence because they do not accumulate mutations C) accumulate mutations at a constant rate, and thus older processed pseudogenes should be shared by a greater variety of species D) are distributed in organisms that are found in similar environments
What is an R plasmid?
A) They are a plasmid that can exist in the chromosome or outside the chromosome. B) It is an F factor that has picked up part of a bacterial genome. C) They carry a gene for resistance to an environmental attribute, such as heavy metals, and genes for the transfer of the plasmid. D) They function in bacterial recombination. E) They are the plasmids that carry the F factor.