A major event in the Precambrian era responsible for dramatically increasing organic material on Earth was:
A) deposition of carbon in rocks. B) leaching of sulfur into the oceans.
C) evolution of photosynthesis. D) evolution of mitochondria.
Answer: C
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Which of the following might be missed if viable counts are done on food and/or water specimens?
A. Aerobic bacteria B. Viable but nonculturable cells C. Pathogenic bacteria D. Endospores
Organelles are __________
A. structures that contain the genetic material. B. membrane-bound compartments of eukaryotic cells. C. the region that contains the DNA in prokaryotic cells. D. the outer, rigid covering of a prokaryotic cell.
To which part of the centromere do mitotic spindle fibers attach during prometaphase?
A. Chromosome B. Microtubule C. Centriole D. Kinetochore
Wernicke's area _____
A) is active when speech is heard and comprehended B) is active during the generation of speech C) coordinates the response to olfactory sensation D) is found on the left side of the brain