The human disease sleeping sickness is caused by an organism in which group?
a. Diplomonads
b. Euglenozoans
c. Stramenopiles
d. Alveolates
e. Amoebozoans
Answer: b. Euglenozoans
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Which of the following is NOT true of the
effects of UV light on DNA?
a. it breaks DNA into pieces b. it causes kinks in the DNA molecule c. it causes the formation of nucleotide dimers d. it causes covalent bond formation between adjacent thymines e. it causes permanent mutations
The placenta forms from embryonic tissue and
A) bone marrow. B) amniotic fluid. C) the embryonic disk. D) endometrium. E) the yolk sac.
The largest population that can be maintained in an environment for an indefinite period of time is called the carrying
capacity. Indicate whether the statement is true or false.
The movement of an action potential along a neuron is most like ________
A) the ripples created by dropping a pebble into a pond, gradually decreasing in size as the waves spread apart B) a crowd at a sporting event doing the wave around a stadium C) a radio tower emitting a signal that reaches only a small region D) the sound of your voice spreading out as you yell loudly to your friend while at a park