Valley fever, a medical condition caused by Coccidioides immitis, is caused by
A. common allergic reactions that many people have to the fungus.
B. entry of the fungal spores by inhalation.
C. toxins produced by the fungus.
D. a mutation of the common fungal inhabitant of human hair, nails, and skin.
E. eating the fruiting body, rather than the mycelium of the fungus.
B. entry of the fungal spores by inhalation.
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Cells in the nervous system that send and receive electrical signals are called ____
a. receptors b. neurons c. sensors d. glial cells e. signal cells
Which of the following can be found inside of a plant cell but not an animal cell?
a. mitochondria b. ribosome c. chloroplast d. Golgi apparatus
Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown
that after the bacterium enters the root, cells of the root cortex begin to divide in response to
a. a flavonoid released by soybean roots. b. nod gene products produced by soybean roots. c. nod gene products produced by the bacterium. d. nitrogen fixation by the bacterium. e. a flavonoid produced by the bacterium.
Which component of transcription or translation has the anticodon?
A) RNA polymerase B) rRNA C) mRNA D) ribosome E) tRNA