Propionibacterium
A. produces propionic acid.
B. produces lactic acid.
C. is responsible for the holes in Swiss cheese.
D. requires aerobic environments.
E. produces propionic acid AND is responsible for the holes in Swiss cheese.
E
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A microbiologist is working with a bacteria strain to determine if cells are competent. Cells are grown under optimal conditions with DNA fragments that carry two genes, green fluorescent protein and ampicillin resistance, and then plated to nutrient agar with and without ampicillin. Following incubation, plates are examined for fluorescent colonies under a UV lamp. Predict the results if cells are competent.
A. Colonies will be present on both types of plates, but will only fluoresce on the ampicillin agar plates. B. Fluorescent colonies will be present on the the ampicillin agar plates, but there will be no growth on the nutrient agar plates. C. Fluorescent colonies will be present on both types of plates. D. There will be no growth on either type of plate.
The class of echinoderms that releases tubules or eviscerates internal organs is called:
a. Holothuroidea. b. Asteroidea. c. Ophiuroidea. d. Echinoidea. e. Crinoidea.
Fungi that feed on dead tissue are saprophytes
Indicate whether the statement is true or false
An important advantage of sexual reproduction is related to _____
a. increasing production of offspring b. avoiding predators c. avoiding harmful mutations d. producing offspring identical to the parents e. having two sexes