The origin of multicellular life proceeded through the mechanism of endosymbiosis. Indicate whether the statement is true or false
F
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What evidence supports the hypothesis that a meteorite impact might have caused the extinction at the end of the
Mesozoic? What will be an ideal response?
One of the most severe El Niño events on record began in what year?
A) 1974 B) 1999 C) 2004 D) 1997
Which of the following is evidence of recent changes in polar regions?
A) Ice sheet darkening B) Increase in meltponds C) The breakup of ice shelves D) Decrease in Arctic sea-ice volume E) Decrease in sea ice volume, ice sheet darkening, increased meltponds, and ice shelves calving are all evidence of recent changes in polar regions.
What is a common use for a hose clamp?
a. allow a hydrant to be opened before the supply line is connected to the pump intake b. regulate pressure/volume in a single hose c. control a burst section of hose line without interrupting water flow d. allow for a quick-connect of an attack line to a pumper when the threads do not match