Atoms of a particular element that have a different number of neutrons in their nuclei are called
______. Fill in the blank(s) with the appropriate word(s).
isotopes
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If an unsaturated air parcel with a temperature of 20oC rises, forms a non-precipitating cloud, then returns to its original altitude,
A) the parcel's final temperature will be less than 20 oC B) the parcel's final temperature will be exactly 20 oC C) the parcel's final temperature will be greater than 20 oC
Stalactites form on the roof of caves.
A. True B. False
The European Union nations ________
A) produce so little food that they have to import most meats and vegetables B) do not support the growth or sale of GM crops C) have refused to allow synthetic pesticides to be used on nonexported crops D) along with Canada, Brazil, and Argentina have developed and planted many GM crops E) have converted all farms to organic agriculture
The development of ________, organisms that reproduce sexually and have cells that contain nuclei, may have increased dramatically the rate of evolutionary change
Fill in the blank(s) with correct word