How many nucleotides are different in one sequence from those in the other?
a. 1
b. 2
c. 3
d. 4
a
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Which observation was most influential to Charles Darwin?
A) the wide variety of living things in South America B) the difference between organisms of South America and organisms of Europe C) the similarity between organisms of South America and organisms of Europe D) the slight differences between organisms on nearby islands
Which of the phylogenetic trees above best demonstrates cladogenesis?
A. Tree 1
B. Tree 2
C. Tree 3
D. Both Tree 2 and Tree 3
E. Both Tree 1 and Tree 2
A sea star suffers from an infection that affects its ampullae. Due to the infection, the ampullae no longer function. What do you predict will be the effect on the sea star?
A. No noticeable effect will occur. B. The sea star will be unable to reproduce. C. The sea star will be unable to extend its tube feet. D. The sea star will be unable to store energy.
Glutamate is the major excitatory neurotransmitter in the brain. Which drug produces a relaxing effect by blocking the receptors for glutamate?
A) Methamphetamine B) Cocaine C) Nicotine D) Caffeine E) Alcohol