Which of the following statements about the prokaryotic flagella is CORRECT?
a. it's filament is made up of multiple types of proteins
b. it is driven by the proton motive force
c. it is made up of a single structure
d. it moves with a whiplike motion
Answer: b. it is driven by the proton motive force
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Choose the factors contributing to adaptive radiation of Drosophila in the Hawaiian Islands. Check all that apply.
_____ New islands are constantly being formed. _____ There are high rates of mutation due to radioactive materials in the lava flows. _____ The islands are highly volcanic. _____ Drosophila species have no predators on the Hawaiian Islands.
In reabsorption
a. plasma proteins are returned to the blood. b. excess hydrogen ions are removed from the blood. c. excess water is passed on to the urine. d. nutrients and ions are selectively returned to the blood. e. drugs and foreign substances are passed into the urine
Which of the following statements is NOT true about
the reproductive behavior of voles? a. Oxytocin induces monogamy in female prairie voles. b. Monogamous species have fewer oxytocin receptors than promiscuous species. c. ADH receptors in the brain play a role in monogamy. d. Mountain voles are more promiscuous than prairie voles. e. Male meadow voles are not monogamous.
Select the best response to the question
?Which of the following statements describes the "Golden Age of Microbiology?" A) Most agents of bacterial disease were identified and cultivated. B) Jenner developed the smallpox vaccine. C) Leeuwenhoek developed the microscope. D) Aseptic techniques such as hand washing were first promoted.