Alcids and penguins have had similar adaptations selected despite them being in different groups. What is this an example of?
a. Synchronous evolution
b. Convergent evolution
c. Concise evolution
d. Divergent evolution
b
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You are experimenting with a variety of lipids to determine their efficacy for use as drug delivery system liposomes. What is one feature of the individual lipid that would best ensure the use of a lipid for this purpose?
A) It must have a structure similar to cholesterol. B) It must be composed entirely of unsaturated fatty acids. C) It should be exclusively hydrophilic. D) It should be amphipathic. E) It should be exclusively hydrophobic.
You notice that the majority of the electrons in NaCl spend their time around the chlorine. You also notice that the electrons in H2 are evenly distributed among the two atoms. Which two types of bonds are represented in these molecules?
A. Covalent bonds in NaCl; ionic bonds in H2. B. Covalent bonds in NaCl; covalent bonds in H2. C. Ionic bonds in NaCl; ionic bonds in H2. D. Ionic bonds in NaCl; covalent bonds in H2.
The outer segments of cones and rods contain ____
a. metabolic machinery b. light-inhibiting photopigments c. light-absorbing photopigments d. synaptic terminal e. ciliary muscles
Currently, what is the biggest threat to the Klamath-Siskiyou forest, which is an endangered ecoregion in North
America? a. nesting birds b. greenhouse gases c. rising sea levels d. fires e. logging