The most oxygenated blood is indicated by the letter ____
a. A
b. B
c. C
d. D
e. E
ANSWER: d
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When individuals have mitochondrial disorders, why are the skeletal and heart muscles and the brain most often affected?
a. They are the most important organs. b. They have the highest energy needs. c. They are generally very fragile. d. They have fewer mitochondria in the cell. e. They are the most complex organs.
What is the correct order of water flow for fish respiration? a. Water into the mouth - goes through the gill slits - water enters the pharynx
b. Water enters the pharynx - goes through the gill slits - water exits the mouth. c. Water enters the pharynx - goes through the gill slits - water exits the mouth. d. Water goes through the gill slits - water enters the pharynx - water exits the mouth. e. Water into the mouth - water enters the pharynx - goes through the gill slits.
What factor affects the average temperature of a region?
A) the amount of cloud cover that exists B) the amount of light energy per unit area hitting it C) whether there's an El Niño that year D) the amount of precipitation it receives
According to the text, this is the earliest member of the genus Homo to appear in the fossil record.
A) founder effect
B) Homo Habilis
C) Latin binomial
D) Australopithecus Africanus
E) convergent evolution
F) Ardipithecus ramidus
G) Neanderthals
H) chimpanzees
I) Homo erectus
J) astragalus