A canyon that is much deeper than it is wide with vertical or near vertical sides is called a(n)
a. mountain canyon.
b. grand canyon.
c. slot canyon.
d. deep canyon.
e. stream canyon.
C
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Tens of thousands of people were killed in the 1991 Pinatubo eruption because of a lack of prediction of the eruption
Indicate whether the statement is true or false
After four half-lives of decay, what is the ratio of radioactive parent isotope to stable daughter isotope?
a. 1:15 b. 1:1 c. 1:31 d. 1:3 e. 1:7
In considering the major vegetational associations, we should remember that ________
A) deforestation has accounted for it all B) extraterrestrial factors have created the boundaries C) they have been stable for a billion years D) they have been around as long as the Earth E) change is inevitable
The type of cell division in which resulting cells contain one chromosome from each pair is
called _______. Fill in the blank(s) with the appropriate word(s).