The vaccines that are used to protect people from diphtheria and tetanus are:
A) antitoxins.
B) attenuated vaccines.
C) inactivated vaccines.
D) toxoids.
D) toxoids.
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In the original experiments by Stanley Miller and Harold Urey to synthesize organic molecules in an abiotic environment, which one of the following would you NOT expect to find in the collection flask?
A. urea B. amino acids C. ATP D. adenine E. formaldehyde
The characteristic that makes the muscle cells unique is the relative abundance and organization of
A. collagen fibers. B. gelatinous mass. C. actin and myosin fibers. D. keratin fibers. E. fibroblast cells.
How do the numbers of chromosomes differ for organisms?
A) Among all known living creatures, humans have the most chromosomes. B) Animals have more chromosomes than plants. C) Eukaryotes have more chromosomes than prokaryotes. D) Prokaryotes have more chromosomes than fungi.
A condition called a ________ is caused by a lack of iodine in the diet.
Fill in the blank(s) with the appropriate word(s).