Why are new flu shots necessary every year?
A) The antiviral chemicals in flu shots last only 11 months.
B) Flu shots do not result in the production of memory cells.
C) Depending on the year, either bacteria or viruses cause the flu.
D) Flu viruses have a high mutation rate.
D
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In last week's lab we performed an experiment to see whether or not termites orient to the lines of black ink pens. In this experiment, _____ was the dependent variable and _____ was the independent variable.
A. Orientation of termites, presence of ink B. Time termites spend on side A, number of termites C. Presence of ink, orientation of termites D. Presence of ink, time termites spend on side A E. Time termites spent on side A, presence of ink
The frequency of a sound wave determines the ________ of the sound you hear
A) loudness B) tone C) amplitude D) pitch
What must occur for bacterial conjugation to take place?
a. The cells must come into contact with each other. b. Each cell must contain a plasmid. c. One of the cells must be E. coli. d. The cells must transfer RNA.
What are some challenges of cataloging a microbiome? Choose all that apply.
A. Many of the species use RNA instead of DNA. B. Most microbiome species are dangerous pathogens. C. Many of the different fungal species look like identical strings of hyphae. D. Since many species are unnamed and uncharacterized, DNA sequencing is useless. E. Microbes have such small amounts of DNA, it cannot be amplified. F. Many of the different bacterial species look like identical tiny rods.