Which term refers to the variety of metabolic compounds in an ecosystem?
a. chemical diversity
b. genetic diversity
c. ecosystem diversity
d. biodiversity hotspots
a. chemical diversity
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If we are analyzing the origin of new families, orders, etc. over time, we are studying
a. microevolution b. mutation c. macroevolution d. natural selection e. anagenesis
The "age of fishes" was the _____ period.
A. Ordovician B. Silurian C. Carboniferous D. Permian E. Devonian
There has been considerable support for the hypothesis that peptides can function as satiety signals, what does the support suggest?
What will be an ideal response?
Which of the following would not be seen in a cross-section through the woody part of a root?
a. sclerenchyma cells b. parenchyma cells c. sieve-tube elements d. root hairs e. vessel elements