A major biological paradox is that genes are generally highly conserved and yet
A. there is very little difference among life forms existing today.
B. there is so much diversity among life forms existing today.
C. there are a huge number of ancestral genomes no matter how far back we look.
D. there are essentially identical development patterns in all species.
E. there is very little research into genomic sequences.
B. there is so much diversity among life forms existing today.
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Water has many unique properties. Can you identify the property of water that is responsible for each of the following observations?
a. Many insects, such as the water strider, are able to move across the surface of water. b. Most people get chilled immediately after taking a shower. c. A dime can be made to "float" on the surface of a glass of water. d. The dime will sink if salt is added to the water. e. On cold days, the water temperature is often warmer than the surrounding air. f. Ice forms on the surface of lakes and rivers. g. Many salts dissolve in water. h. Many oils will not dissolve in water. i. The coastal areas of the world have a climate that is more moderate than inland areas. j. Some springs contain high amounts of arsenic. k. The Great Salt Lake contains high quantities of mineral solutes.
Cancer cells
a. have an abnormal chromosome number. b. are unable to attach to other cells. c. divide to produce high densities of cells. d. have malformed cytoskeletons. e. fit all of these descriptions
Four of the five enzymes listed below perform their
task in the same location. Select the exception. a. pepsin b. lipase c. carboxypeptidase d. nuclease e. disaccharidase
Organs that come into contact with the environment are lined with which type of tissue?