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.

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

Unstable isotopes can be useful

A) catalysts. B) in medical diagnosis. C) in vitamins. D) in the formation of hydrogen bonds. E) as buffers.

Biology & Microbiology

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

Biology & Microbiology