The seeds of many plant species are dispersed by a harmless temporary attachment to an animal's fur or feathers. This form of dispersal can be classified as
A. ectoparasitism.
B. amensalism.
C. mutualism.
D. pollination.
E. phoresy.
E. phoresy.
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Which is the simplest of all levels of organization?
A. atom B. cell C. organ D. organism E. population
The diaphragm is responsible for what?
a. pushing on the lungs during exhalation b. pulling on the lungs to inflate them c. creating negative pressure around the lungs d. creating positive pressure around the lungs
In systemic acquired resistance, the regulatory protein NPR-1 moves from the cytoplasm to the cell
nucleus, apparently in response to a buildup of ____ in the cytoplasm.
a. ethylene b. brassinosteroids c. oligosaccharins d. jasmonates e. salicylic acid
All of the following statements describe characteristics of cancer cells EXCEPT which one?
A) Cancer cells may migrate to other locations in the body. B) Cancer cells often have an enlarged nucleus. C) Cancer cells lose the ability to control cell division. D) Cancer cells typically are overdifferentiated. E) Cancer cells no longer perform their specialized functions prior to becoming cancerous.