The signal molecule produced in quorum sensing is
a. A counterstain.
b. An inducer.
c. Light.
d. A simple stain.
e. An endospore.
Ans: b. An inducer.
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You wanted to test a single fruit fly for the presence of the TOLL protein , so you prick it with a needle coated in fungal spores. The fly dies 2 days later. Which of the following statements is TRUE?
A. This is evidence that the TOLL protein is present. B. This is evidence that the TOLL protein is not present. C. The TOLL protein is only found in humans. D. This is inconclusive evidence.
In the life cycle of bryophytes and seedless vascular plants, meiosis takes place in the
a. gametophyte. b. sporangium. c. archegonium. d. zygote. e. antheridium.
Which system produces red blood cells?
a. endocrine b. skeletal c. muscular d. defense e. integumentary
What technique would be most appropriate to use to observe the movements of condensed chromosomes during cell division?
A) standard light microscopy B) scanning electron microscopy C) transmission electron microscopy