In which of the following can hydrogen bonding occur?
A) in pure formaldehyde
B) in pure acetone
C) in a solution of formaldehyde in water
D) in none of these cases
C
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Vulcanian eruptions are generally far larger and more dangerous than Hawaiian or Strombolian
eruptions. Indicate whether the statement is true or false.
Some biologists have identified symbiotic relationships in which it appears that one organism gains from the relationship while the other organism is unaffected
Although after further research, the researchers find out that both members of the relationship benefit. The researchers therefore realize that A) what they at first thought was an example of mutualism is really an example of commensalism. B) what they at first thought was an example of commensalism is really an example of mutualism. C) what they at first thought was an example of symbiosis is really an example of parasitism. D) what they at first thought was an example of symbiosis is really an example of amensalism.
Chemical weathering would be most effective ________
A) in a warm, wet climate B) in a cold, dry climate C) in a warm, dry climate D) deep beneath a mountain range
A biome is a large, stable community of plants and animals whose boundaries are closely linked to climate
Indicate whether the statement is true or false