The infective phase of Giardia lamblia is
A. the oocyst
B. the cyst
C. the trophozoites
D. the promastigote
Ans: B. the cyst
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Vibrio cholerae produces a toxin that destroys the intestinal epithelium. This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans. What is this relationship?
A. Mutualistic B. Commensalistic C. Symbiotic D. Atavistic Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about symbioses? How does it relate to the question? · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the statements below does not describe quantitative data?
a) the scientist took soil samples to identify the amounts of sand, clay, and silt in the soil b) the scientist measured many leaves on the plant and recorded the data c) the scientist made observations about the color of the plant's leaves d) the scientist recorded the weather conditions in his notebook the days he studied the plant
Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.
Answer the following statement true (T) or false (F)
The two most common types of polyploidy in humans are
A. trisomy and aneuploidy. B. triploidy and haploidy. C. triploidy and tetraploidy. D. tetraploidy and diploidy. E. haploidy and diploidy.