About 55% of whole blood is ________, which is/are mostly made up of water
A) plasma
B) hemoglobin
C) white blood cells
D) clotting proteins
E) hematocrit
A
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True or false: When two populations have undergone allopatric speciation long enough to have a difference of one fixed allele between the two populations, they are sufficiently different to be considered two different species
A. true B. false
The pentose sugars found in DNA and RNA differ in which of the following ways?
A. The ribose in RNA lacks a hydroxyl group on the 2' carbon. B. The deoxyribose in DNA has a hydroxyl group in the 2' position but not the 3'. C. Both sugars have 5 carbons and form 5-membered rings, but ribose has an oxygen in the ring and deoxyribose does not. D. Both sugars have "puckered" rings but differ in which carbon lies outside of the plane of the rest of the ring atoms. E. The ribose in RNA attaches to the nitrogenous base through the 2' carbon, whereas the deoxyribose attaches to the base through the 1' carbon.
What branched structure allows a neuron to take in information from more than one source?
A. node of Ranvier B. axon C. myelin D. dendrite
The initial, brief period of early, general symptoms such as fatigue and muscle aches, is the
A. period of invasion. B. prodromal stage. C. convalescent stage. D. incubation period. E. All of these choices are correct.