Which of the following statements are true of xylem?
_____ It is found in all land plants.
_____ It assists in conducting materials, such as water and minerals, throughout the plant.
_____ It provides structural support to the plant.
_____ It is found in the gametophyte generation, but not in the sporophyte.
_____ It contains specialized cells known as tracheids.
_____ It is found in all land plants.
__X__ It assists in conducting materials, such as water and minerals, throughout the plant.
__X__ It provides structural support to the plant.
_____ It is found in the gametophyte generation, but not in the sporophyte.
__X__ It contains specialized cells known as tracheids.
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A competitive inhibitor will affect the ________ of an enzymatic reaction
A) Km B) Vmax C) S D) P E) both Km and Vmax
Photosynthesis Photosynthesis
a) is NOT dependent on chlorophyll. b) does NOT involve oxidation-reduction reactions. c) produces water and carbon dioxide. d) produces glucose and oxygen. e) None of the answers are correct.
Unstable isotopes can be useful
A) catalysts. B) in medical diagnosis. C) in vitamins. D) in the formation of hydrogen bonds. E) as buffers.
The shape of the beaks of Darwin's finches and industrial melanism are often cited as examples of the process of ________ leading to evolutionary change.
A. founder effect B. coevolution C. natural selection D. intelligent design E. artificial selection