Edward Jenner infected individuals with ____ to protect them from ____
a. chickenpox; smallpox
b. smallpox; chickenpox
c. smallpox; cowpox
d. cowpox; smallpox
e. cowpox; chickenpox
ANSWER: d
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The common ancestor of the protostomes had a coelom. What does this suggest?
A) All lophotrochozoans have a coelom. B) There are no pseudocoelomates within the protostomes. C) There are no acoelomates within the protostomes. D) The body cavity evolved before the lophophore.
During a DNA sequencing experiment, the researcher adds all the required components to the reaction but accidentally
adds only one of the four dideoxynucleotides, the ddC. What products will be observed after this reaction is complete?
a. All fragments will end in A. b. All fragments will end in C. c. All fragments will end in G. d. All fragments will end in T. e. No fragments will be made.
Four of the five answers listed below are
characteristics of cnidarians. Select the EXCEPTION.
a. larvae b. polyp c. gill slits d. medusa e. nematocysts
How is it that people can donate blood plasma twice per week?
A. Plasma only contains fluid and dissolved substances such as proteins that can be rapidly replaced. B. Plasma contains platelets which can be replaced quickly. C. Plasma contains red blood cells which can be replaced quickly. D. Plasma contains only water and can be rapidly replaced. E. Plasma is regenerated from the blood cells injected back into the donor.