A keystone species has a greater effect on community structure than its numbers might suggest
Indicate whether the statement is true or false.
ANSWER: True
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In natural samples it is often difficult to differentiate live cells from dead cells or cells from nonliving matter
Indicate whether the statement is true or false.
When compared to the conducting tubes of xylem what is unique about phloem? a. The sieve tubes are blocked
b. The sieve tubes are formed from vessel elements. c. The sieve tubes are living. d. The sieve tubes are folded over. e. The sieve tubes contain tracheids.
After an initial rapid rise in the number of species on Earth, there was a plateau that experienced very little fluctuation in the number of species.
Answer the following statement true (T) or false (F)
The opportunistic obligate parasite (Microsporum/Pneumocystis/Rhizopus) is considered a member of the normal microbiota.
Fill in the blank(s) with the appropriate word(s).