It took more than 100,000 years for the human
population to grow to one billion individuals
and took about ____ years to add five billion
more.
a. 200
b. 20,000
c. 100,000
d. 200,000
e. 500,000
A
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A certain wastewater treatment plant uses aerobic bacteria, anaerobic bacteria, and archaebacteria during secondary treatment of sewage. Unfortunately, during a bad blizzard the aerated tanks froze, killing the microbes inside. What is likely to result?
A. Floc levels will diminish. B. Methane production will go down. C. Solid material will not be effectively filtered out. D. Floc will not be effectively filtered out. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about wastewater treatment with bacteria? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In a pond, tadpoles eat algae and fish eat the tadpoles. Above the pond, grasshoppers eat grass and, at night, are preyed upon by bats. Other bats eat the fish that eat the tadpoles. In this community, the fish-eating bats are:
A. primary producers. B. primary consumers. C. secondary consumers. D. tertiary consumers. E. detritivores.
Explain the reasoning behind the laws in some European countries that limit the number of children that can result from a single sperm donor. Do you agree with these restrictions? Why or why not?
What will be an ideal response?
Toxic oil compounds' effects on the invertebrates include(s):
a. tainted flesh moving up the food chain. b. all invertebrates are tolerant of oil pollution. c. acting like a narcotic. d. both a and c