What is a pheromone?
A. A new form of chemical insecticide waiting approval by the EPA
B. A strong herbicide
C. A species-specific chemical sex attractant
D. A chemical that travels in the bloodstream and controls an organism's growth and development
E. A safe, natural pesticide
Answer: C
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Explain the changes that occur in the carbon cycle and how it relates to long term changes in climate.
What will be an ideal response?
What are the annual averages for each of the past 3 years?
What will be an ideal response?
The vast open ocean is dominated by picoplankton that are efficiently grazed by ________.
A. heterotrophic dinoflagellates B. ciliates and tintinnids C. whales D. copepods
Where podzolization occurs, the soil tends to be:
a. strongly basic. b. moderately basic. c. neutral. d. strongly acidic.