The solvent, cohesive, and temperature stabilization
properties of water are due to its
a. ability to promote hydrophilic interactions.
b. ionic bonds.
c. hydrogen bonds.
d. ability to promote hydrophobic interactions.
e. nonpolar nature.
Answer: c
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Indicate whether the statement is true or false.
You discover a bacteria species in a deep ocean sample that can turn olive oil into pure gold. The bacteria do not replicate well at sea level, and one night all of your "Golden" bacteria die. What can you do to possibly retrieve the gold-making gene from the dead Golden bacteria?
A. Transform a live bacterial strain with the Golden bacteria's DNA. B. Transduce a live bacterial strain with the Golden bacteria's DNA. C. Transduce the Golden bacteria and then infect a live strain of bacteria with the transducing virus. D. There is nothing you can do because the cells are dead. You will have to search the ocean and hope to find the elusive bacteria again. E. Conjugate a live bacterial strain with the Golden bacteria.
Conifers produce copious amounts of pollen during reproduction. What would be a likely consequence of a significant reduction in the amount of pollen produced by conifers?
A. There would be a decrease in the number of seeds produced because the chances of pollen reaching a female cone of the same species would be reduced. B. There would be a significant negative effect on the viability of seeds because double fertilization could not occur, so there would be no food available for the growing embryo. C. There would be a significant decrease in the genetic diversity of embryos, but little effect on the number of seeds as only one pollen grain is necessary to fertilize a single female cone. D. There would be little effect because coevolved pollinators would still be able to transfer pollen from the male cones to the appropriate female cones.
A 67- year old patient with severe sepsis undergoes a full infectious work-up upon admittance to the intensive care unit. Cultures of urine, blood, sputum and cerebral spinal fluid are obtained. The cultures do not yield a specific organism, so further analysis of the sample is done to determine the characteristics of the microorganism. The metabolic processes are analyzed in the lab The organism is found to grow throughout the entire tube of broth media. Which of the following terms best describes the oxygen requirement of this organism.
a) obligate aerobe b) microaerophile c) facultative anaerobe d) obligate anaerobe