The release of DDT into the environment to control
some insect pests results in the highest detectable
concentrations
a. at the beginning of the food chain.
b. in the targeted insect pest.
c. close by rivers and lakes.
d. at the top of the food chain.
e. in the targeted ecosystem.
Answer: d
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During a scientific expedition to an unexplored forest, you discover a new species of plant. The plant has net-veined leaves, flowers, and pollen grains with a single groove. Based on this information, you assign the plant to which of the following groups?
1.eudicots 2.gymnosperms 3.magnoliids 4.monocots
Which of the following organisms cause malaria?
a. butterflies b. mosquitoes c. flies d. wasps e. Plasmodium
Trace a drop of blood as it enters the vena cava and travels through the heart and body. Include the major vessels and the heart chambers and valves in your answer
What will be an ideal response?
What might happen to your red blood cells if you were suddenly unable to regulate the solute concentration of your blood and it began to rise?
A. Your blood cells would shrivel because water would move out of the cells via osmosis. B. Your blood cells would stay the same size. C. Your blood cells would enlarge and could rupture because water would move into the cells via osmosis. D. We do not have enough information to answer this question.