Evolutionarily, the jaws of vertebrates developed from
A. the operculum.
B. the last pharyngeal arch of jawless fishes.
C. the circular mouth of lampreys.
D. the third pharyngeal arch of jawless fishes.
E. the claspers.
Answer: D
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After melting a significant quantity of lab equipment during a previous experiment, your colleague decides to recoup his losses by synthesizing trendy vitamin-infused beverages for sale during his off time. He knows that the vitamins he’s chosen won’t dissolve in water, so he’s planning to dissolve them in oil and then blend the vitamin-oil solution into soda water. What’s the flaw in your colleague’s plan?
a. Soda water will leach vitamins from the oil, causing them to settle out of the beverages. b. Vitamins are only soluble in trans fats, which will negate the health benefits of his products. c. Oils are hydrophobic, so his beverages will separate before they can be consumed. d. Carbonation in soda water will cause the fatty acids to decompose into alcohol.
The several species of finches that developed on the group of islands in the Galápagos are an example of
A. convergent evolution. B. adaptive radiation. C. divergent evolution. D. polyploidy.
Some amoebae have a covering over their plasma membrane. These amoebae are referred to as ________ amoebae.
Fill in the blank(s) with the appropriate word(s).
Most of the water moving through a plant is lost through ____.
A. osmotic gradients in the soil B. transpiration C. translocation D. photolysis E. photosynthesis