In lakes, large numbers of decomposers are found in the ____.
A. limnetic zone
B. benthic zone
C. littoral zone
D. profundal zone
E. abyssal zone
Answer: B
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Which of the following roles do streams play in shaping landforms?
A) erosion, transportation and deposition B) weathering, transportation and deposition C) erosion, weathering and deposition D) erosion, transportation and weathering
What is a major source of nitrate to coastal waters?
a. excretion b. soil runoff c. urea d. nitrifying bacteria e. atmospheric deposition
In a terrestrial food web, which of the following categories of organisms will have the highest total energy content and biomass?
A) Primary producers B) Carnivores C) Consumers D) Herbivores
How does natural selection operate Select all
a. natural selection changes the allele frequencies of an individual b. individuals with adaptations to their environment pass on their genes to more offspring c. organisms acquire new physical traits to survive in an environment, then they pass these on to offspring so that they can survive d. natural selection acts on genetic variation of organisms in a population e. natural selection produces differences in traits, and these traits can either increase or decrease survival and reproduction