The conducting cells in xylem are
A. sieve tube elements.
B. tracheids and sieve tube elements.
C. tracheids.
D. tracheids and vessel elements.
E. vessel elements.
D. tracheids and vessel elements.
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The advantage(s) of second-generation DNA sequencing compared to the Sanger method are the result of
A) miniaturization of reaction size. B) increased computing power. C) increased length of DNA sequences obtained. D) miniaturization of reaction size and increased computer power.
The term polarity is associated with mutations in eukaryotic cells
Indicate whether the statement is true or false
Which of the following does NOT describe a keystone species?
a. a species on which other species depend b. a species whose removal would have a dramatic effect on the community c. a species that plays a central role in holding the community together d. a species that always occupies the highest trophic level in a community e. a species whose removal would destabilize the food web
Which one of the following types of cancer is preventable by a vaccine?
A) lung cancer B) cervical cancer C) breast cancer D) colon cancer E) skin cancer