Which of the following is most likely to grow at refrigerator temperatures?
A. mesophiles
B. psychrophiles
C. thermophiles
D. acidophiles
B. psychrophiles
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Match each scientist or group of scientists on the left with the appropriate statement to the right.
A) hereditary factors B) pollen grain C) chromosome theory of heredity D) dog saliva E) "ferments" of yeast F) transformation G) DNA double helix H) embryonic plant I) transfer RNA J) embryonic bacteria K) fruit fly L) transcription M) translation N) Calvin-Benson cycle O) "one gene—one enzyme" P) oral bacteria Q) urea 1) Gregor Mendel 2) Walter Sutton 3) Matthias Schleiden 4) Oswald Avery, Colin MacLeod, and Maclyn McCarty 5) George Beadle and Edward Tatum 6) James Watson and Francis Crick 7) Thomas Hunt Morgan 8) Friedrich Wöhler 9) Louis Pasteur
A microorganism that has been used in the production of sour mash whiskey is ________.
A. Lactobacillus delbrueckii B. Leuconostoc mesenteroides C. Lactococcus lactis D. Saccharomyces cerevisiae
In the avian and mammalian eye, the lens remains stationary but changes shape in order to focus on objects at various distances. This is called "accommodation" and is accomplished through adjusting muscle control of the lens in order to
A. control the amount of light admitted to the eye through the pupil. B. alter the sensitivity of the eye to varying light levels. C. convert light energy into electrical signals by the retina. D. bend light rays to varying degrees according to the angle at which light enters the eye. E. regulate the vitreous humor volume.
If humans had been present to build log structures during the Carboniferous period (they were not), which plant types would have been suitable sources of logs?
A) horsetails and bryophytes B) lycophytes and bryophytes C) ferns, horsetails, and lycophytes D) charophytes (stoneworts), bryophytes, and gymnosperms