What feature of a dinosaur determines whether it is a saurischian or an ornithischian dinosaur?
a. size
b. habitat
c. feeding preference
d. pelvic bone structure
e. number of feet it walks on
d
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Tony sometimes seems very "wound up." At those times, he seems full of energy, talks very rapidly, and makes very grandiose plans. (One time, he gave away all of his belongings and was planning to move to Washington, D.C., so he could advise the President.) At these times, he also seems to need almost no sleep. During other periods of time Tony seems very "down." During these times he does not take care of himself. He seems to want to sleep all the time, and he often makes thinly veiled references to wanting to commit suicide.
a. Schizophrenia b. Major Depression c. Dissociative Identity d. Bipolar Disorder e. none of the above
What percent of couples in the U.S. are infertile?
a. 1-5% b. 10-15% c. 20-25% d. 50-55% e. 70-75%
The rapid appearance of animals in the fossil record occurred during the Ediacaran radiation
____________________ Indicate whether the statement is true or false.
These lipids have a hydrophobic part and a hydrophilic part
A) carotenoids B) phospholipids C) triglycerides D) steroids