A major difference between bacteria and eukaryotes is that bacteria have:
A) faster mitosis as their method of sexual reproduction.
B) no ribosomes.
C) a rod-shaped nucleus.
D) no membrane-bound organelles.
Answer: D
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A 4-year-old boy who is in day care 3 days per week is irritable and scratching the area around his anus. What morphologic characteristics would most likely be observed on microscopic ex-amination of the appropriate specimen?
a. Large eggs, proglottid shape b. Large eggs with a terminal spine c. Two individual hooklets d. Football-shaped eggs with one flattened side
Augustus Waller invented a machine that measures ____
a. blood pressure when the ventricles are contracting b. blood pressure when the ventricles are relaxed c. cardiac output d. electrical activity of the brain e. electrical activity of the heart
How did the control group differ from the
experimental group in the butterfly experiment? a. They were different species. b. Their native habitat area of the forest differed. c. They tasted worse. d. They had unmodified wing spots. e. They preferred different flower species.
Lyme disease becomes chronic because
A) Borrelia changes its surface antigens frequently. B) Borrelia can lie dormant in liver cells. C) the bacterium resists phagocytosis. D) Borrelia is an intracellular parasite of erythrocytes. E) the bacterium resists phagocytosis and "hides" erythrocytes.