A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?
A. Population ecology
B. Physiological ecology
C. Ecosystem ecology
D. Organismal ecology
E. Community ecology
Answer: E
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When a biologist narrowly defines species based primarily on minor differences, he or she is _________
Fill in the blank(s) with the appropriate word(s).
Members of the ____ Lophotrochozoan phylum are acoelomate, dorsoventrally flattened,and do not have circulatory
or respiratory systems.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Life probably never would have emerged if the ancient atmosphere had been the same as the present one because this molecule interferes with the assembly of simple organic compounds:
a. nitrogen b. oxygen c. hydrogen d. silica e. carbon dioxide
Describe four major functions of DNA in a cell
What will be an ideal response?