A sinuous ridge composed of sand and gravel is a(n) ________; it is a deposit made by streams flowing in tunnels within or beneath glacial ice
A) till
B) drumlin
C) esker
D) arête
Answer: C
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Estimate the amount of plastic in the water bottles that you throw away each year. State your assumptions.
What will be an ideal response?
A hydroxide ion
A. is a water molecule plus a proton. B. is a water molecule plus two extra electrons. C. and a water molecule are the same things. D. is a water molecule minus a hydrogen nucleus.
What were the factors that made it difficult for animals to adapt to land? What will be an ideal response?
Biomagnification is a concentration of toxins
A. Within certain cells of the body B. Within the liver as an organism gets older C. within cells of predators as they consume and store the toxins that were in the bodies of their prey. D. Within the bodies of organisms at low trophic levels E. None of these is true regarding biomagnification