Coarse-grained igneous rocks are interpreted to have cooled slowly from magma, and so they are called:
a) intrusive
b) reclusive
c) extrusive
d) obtusive
e) preclusive
Answer: a) intrusive
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What is the most important aspect of Mendel's genetic studies?
A)Chance is the most critical factor in change. B)Genes controlling traits do not blend during inheritance but are transmitted as discrete entities. C)The traits which an organism inherits are the average of the end member alleles. D)If particular traits do not appear within two generations, they are lost from the species. E)Traits are controlled by single genes.
Which of the following properly describes the formation of continental crust?
A) The formation of continental crust is independent of the formation of oceanic crust, involving only volcanism over the land masses. B) New continental crust is formed essentially in the same many as oceanic crust—from upwelling at mid-continental ridges. C) All continental crust was formed millions of years ago. There is no active continental crust being formed. D) The formation of continental crust involves the entire sequence of seafloor spreading, subduction, remelting of oceanic crust, and subsequent rise of the remelted material.
Which of the following solutions of glucose is isotonic with a 0.15 M NaCl solution?
A) 0.15% B) 0.55% C) 1.5% D) 5.5%
Which of the following objects is best at absorption of incoming light and the emission of heat?
A. A B. B C. C D. D