Which of the following is a plausible explanation for the observation that the size of a taxon's geographic range is positively correlated with its chance of survival?
a. A large range protects a taxon against negative events on a global scale.
b. A large range increases the chances of synchronized population dynamics.
c. Large ranges are always composed of a mosaic of isolated subpopulations.
d. Taxa with large ranges tend to have larger population sizes.
D
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Decontamination strategies used for potable water and the control of E. meningoseptica are similar to those utilized for which organism?
a. Streptococcus pneumoniae b. Staphylococcus aureus c. Listeria monocytogenes d. Legionella spp.
Hemoglobin has a higher affinity for carbon monoxide than for oxygen
a. true b. false
Respond to statements 117–121 in reference to the five items
listed below. a. antigens b. antibodies c. helper T cells d. cytotoxic T cells e. effector B cells E 117. These bind, as in a lock-and-key mechanism, to foreign proteins. D 118. These produce immunoglobulins in response to the reinvasion by a virus. D 119. These directly attack the foreign cells of an incompatible skin graft. M 120. An Rh+ molecule in the body of an Rh woman is an example of these. D 121. Proteins produced by these attack bacteria and viruses in the blood.
When you suffer an injury, white blood cells near the injury site initiate the inflammatory response.
a. true b. false