Which of the following was NOT a likely consequence of the Chicxulub meteorite impact 65.5 million years ago?
A) eruption of massive volcanoes in India, forming deposits known as the Deccan Traps
B) intense acid rain from sulfuric acid forming in the atmosphere
C) global cooling caused by sulfur dioxide and airborne dust blocking solar radiation
D) a massive tsunami in the Gulf of Mexico
E) earthquakes of huge magnitude
A
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In Frederic Clements' view, succession proceeds to an end point called a(n)
A. S1. B. S2. C. equilibrium community. D. climax community. E. tolerant stage.
Which of the following is not a characteristic differentiating Neanderthals from modern humans?
a. Neanderthals had smaller brains. b. Neanderthals were shorter. c. Neanderthals had larger noses. d. Neanderthals were stronger. e. Neanderthals had projecting brow ridges.
A neuron maintains a resting potential primarily because ______ ions leak out of the cell, causing the inside of the cell membrane to become ________ charged with respect to the outside.
A. potassium/negatively B. potassium/positively C. sodium/negatively D. sodium/positively
While trying to start an IV on a patient, Kurt received a needlestick injury and blood exposure involving a patient with AIDS. He was immediately started on three different antiretroviral medications. The advantage of using combined therapy in this circumstance is
A. the duration of treatment is much shorter. B. cost savings to the patient. C. this should prevent the emergence of drug-resistant microbes. D. the drugs only work if given together.