What is a relatively large classification for a group of animals that share similar architecture, level of
complexity, and evolutionary history?
a. Order
b. Phylum
c. Family
d. Genus
ANS: B
There had to have been an abundance of phyla created towards the end of the oxygen revolution. Not
all groups of early marine animals survived. Abundant species still perished. Information can be found
in the section Animals Evolved When Food and Oxygen Became Plentiful.
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Please briefly discuss both the pros and cons of the construction of the Diamer-Bhasha Dam in Pakistan
What will be an ideal response?
San Diego, California, is in the Pacific Standard Time Zone, while Philadelphia, Pennsylvania, is in the Eastern Standard Time Zone. If it is 1 A.M., Monday, in Philadelphia, what time is it in San Diego?
A) 4 A.M. Sunday B) 10 P.M. Sunday C) 4 A.M. Monday D) 11 P.M. Monday
How do seismologists know the outer core is liquid?
A) P-waves are refracted upon arrival in the outer core B) S-waves are absorbed upon arrival in the outer core C) both S-waves and P-waves speed up in the outer core D) both S-waves and P-waves slow down in the outer core
Which of the following is the only description that does not describe magnetic reversals?
A. They are recorded in the ocean crust. B. We are unsure why they occur. C. They occur instantaneously. D. They occur roughly every 500,000 to 700,000 years. E. They are recorded in continental lava flows.