The gas exchange system that depends least on blood perfusion is the system found in _________.
A. birds
B. amphibians
C. insects
D. humans
Ans: C. insects
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In the heart of a reptile or amphibian, where would you expect to find oxygenated blood? Select all correct choices
A. in the right atrium B. in the left atrium C. mixed with de-oxygenated blood in a common ventricle D. mixed with de-oxygenated blood in the right ventricle E. Nowhere; oxygenated blood does not travel through the heart of these animals.
The familiar growth form represented by edible mushrooms, as well as some poisonous mushrooms, is associated with the phylum.
A. Zygomycot B. Ascomycota C. Chytridiomycota D. Basidiomycota E. Glomeromycota
How many codons exist in the genetic code?
a. 3
b. 9 c. 16 d. 64 e. 128
Proteins are three dimensional molecules made of strands of amino acids (imagine a ball of string). There are 20 different amino acids used in proteins found in living organisms. Some of these amino acids are polar and others are nonpolar. Where would a series of nonpolar amino acids most likely be located in a protein that is found in the cytosol of an animal cell?
A. In the interior of the protein B. At the very top of the protein C. On the surface of the protein D. At the very bottom of the protein