The single ventricle in an amphibian heart means the oxygenated and deoxygenated blood mix. How do amphibians manage to survive despite this inefficiency?
A. They transport oxygen across the skin.
B. They keep their body temperatures high.
C. The absorb large amounts of fluid.
D. They keep gills into adulthood.
E. They move very slowly.
Answer: A
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Scleroderma is a disorder that can be caused by
A) retained fetal cells with surfaces that are similar to the mother's cells. B) retained fetal cells with surfaces that are very different from those of the mother. C) retained fetal cells with surfaces that are similar to the father's cells. D) repeated exposure to the scleroderma virus.
What is the primary means of reproduction among the protists, cnidaria, and tunicates?
A. asynchronous reproduction B. sexual reproduction C. asexual reproduction D. hermaphroditic reproduction
Which part of cellular respiration generates water?
A. Glycolysis B. Transition Reaction C. Citric Acid Cycle D. Electron Transport Chain E. All of the above
The oldest fossils of eukaryotes have been estimated to be
A. 6000 years old. B. 8 billion years old. C. 4.5 billion years old. D. 1.5 billion years old. E. 1995 years old.