A host can harbor a pathogen without developing a disease.
a. true
b. false
Ans: a. true
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Inserting a kanamycin resistance cassette into a catabolic operon to confirm the gene is essential in degradation of a particular compound would involve all of the following EXCEPT
A) a reporter gene. B) ligation. C) recombination. D) transformation.
Mast cells are only found in the blood
Indicate whether this statement is true or false.
Motile bacteria have been placed in an environment with a gradient of a chemical attractant. Which of the following behaviors would you predict?
A. The bacteria will only exhibit runs away from the chemical. B. The bacteria will reduce run duration in the direction of the chemical. C. The bacteria will reduce tumbling frequency. D. Bacteria will randomly switch back and forth between runs and tumbles. E. The bacteria will both reduce tumbling frequency and increase run duration in the direction of the chemical.
Mendel selected pea plants for his experiments because ____
a. the offspring are infertile b. others were also using pea plants for their experiments and this would allow data sharing c. male and female flowers are on separate plants d. they can be self-fertilized or artificially fertilized by hand e. he was told by his superior that only pea plants were suitable for experimentation