Functional secondary xylem that conducts water and dissolved minerals is known as:

a. softwood.
b. springwood.
c. hardwood.
d. sapwood.
e. heartwood.


D

Biology & Microbiology

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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

Biology & Microbiology

The traditional kingdom Monera is now divided into two domains, Archaea and Bacteria

a. True b. False

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology