Functional secondary xylem that conducts water and dissolved minerals is known as:
a. softwood.
b. springwood.
c. hardwood.
d. sapwood.
e. heartwood.
D
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There are little birds that spend a great deal of time on the back of a rhinoceros and eat the blood-sucking ticks out of the rhino's ears. The rhino greatly benefits from the relationship, since it cannot remove the ticks itself. The tick-rhino relationship is an example of ________.
A. mutualism B. predator-prey C. commensalism D. parasitism
The traditional kingdom Monera is now divided into two domains, Archaea and Bacteria
a. True b. False
Ultraviolet signals in swordtail fishes and electrical signals in weakly electrical fishes are examples of
____ communication.
a. network b. private channel c. sensory drive d. overheard e. sensory overdrive
Four of the five answers listed below are
related by a common region of the plant body. Select the EXCEPTION.
a. leaf b. root cap c. node d. axillary bud e. stem