All of the following are characteristics of igneous rocks except:
a.
igneous rocks are always thin and brittle
c.
some igneous contain vesicules
b.
igneous rocks contain interlocking grains
d.
igneous rock are composed of crystals

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u. s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u. s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u. s.

Which of the following is a responsibility of a scientist