Chemical defenses that some plant species employ to deter germination and growth of other plants are examples of:
a. exploitative competition
b. interference competition
c. competitive exclusion
d. character displacement
e. resource partitioning
a
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During peristaltic contractions which of the following is not moved from the small intestine to the large intestine?
a. Mucosal cells b. Water c. Active bacteria d. Undigested food matter e. Inorganic substances
Which type of mutagen has a structure similar to one of the DNA nucleotides and therefore can work its way into DNA, where it pairs with a nucleotide?
What will be an ideal response?
Why does the C/N ratio decline over time?
A) Mass increases over time. B) Mass is converted into microbes over time. C) Mass is converted into plants over time. D) More carbon is introduced into the system.
Which of the following supports the idea that eukaryotic cells were formed by the joining of different kinds of prokaryotic cells?
A. Plants have cell walls. B. Mitochondria carry on photosynthesis. C. Chloroplasts contain DNA. D. Animal cells have mitochondria.