Similar species can coexist in a community because of

A. resource partitioning.
B. competitive exclusion.
C. allopatric competition.
D. sympatric competition.
E. allopatric competition and sympatric competition.


A. resource partitioning.

Biology & Microbiology

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Which of the following correctly indicates the hierarchy of skeletal muscle organization from "small" to "big"?

A. sarcomere, myofibril, muscle fiber, motor unit B. myofibril, muscle fiber, sarcomere, motor unit C. motor unit, myofibril, muscle fiber, sarcomere D. motor unit, sarcomere, muscle fiber, myofibril E. None of the choices are correct.

Biology & Microbiology

Which of the following cell types conducts water most rapidly through a plant?  

A.  parenchyma cells B.  sclerenchyma cells C.  sieve tubes D.  vessel members E.  phloem

Biology & Microbiology

DNA has a double helix structure. Refer to the figure below. What two components make the outside rails (called the backbone) of the double helix?



a. nitrogenous bases and carbon
b. hydrogen and ribose
c. sugar and phosphate
d. enzymes and sugar

Biology & Microbiology

Which of the following statements about the cerebrum is NOT true?

A. The cerebrum coordinates the activities of the other parts of the brain. B. It is the largest part of the human brain. C. The right hemisphere is associated with analytical reasoning and the left hemisphere is associated with artistic and musical ability. D. The two cerebral hemispheres are connected by the corpus callosum. E. The gray matter is outermost.

Biology & Microbiology