Analysis of the phylogeny of flu viruses reveals that the two 1968 strains (see the accompanying figures) both carry neuraminidase N2, but their hemagglutinins are distantly related (H2 and H3)
Moreover, before the global pandemic of 1968, human flu viruses had never carried H3. This observation suggests that ________. A) H3 was acquired from a nonhuman strain which, in turn, allowed the virus to infect humans on a global scale
B) flu strains, when present together in the same host cell, can trade genes
C) the 1968 human flu strain acquired its H3 gen from a bird virus
D) All of these conclusions are supported by this data.
D
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Consider the cross AaBbCcddEe X AABBccDDEe. If these 5 allele pairs all assort independently, then the probability that any individual offspring will have the genotype AABBccDdEe is 1 out of
What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Place the structures in the correct order that light would pass through them before reaching the retina.
a. Cornea, b. Aqueous Humor, Lens c. Viterous Humor d. all of the above
Which of the following protists is the cause of "beaver fever"?
a. Physarum polycephalum b. Plasmodium falciparum c. Giardia lamblia d. Pseudomonas aeruginosa
Most of the oxygen in the blood is transported
A) by white blood cells. B) in the plasma. C) as bicarbonate ions. D) bound to hemoglobin. E) combined with carbon dioxide.