BIOS 41: Bio Core I EXAM ONE – 9Feb2011 NAME _________________________ There are 50 questions on the test, worth a total of 100 points. You should mark your answers on the test first and then transfer them to the scantron sheet(this minimizes erasures on the scantron sheet). Read each question carefully and mark answers using a No. 2 pencil. Please write the letter of this test version (right) on your answer sheet. 1.Approximately when did the first aerobic eucaryotic cells appear? (a) 65 million years ago (b) 250 million years ago (c) 800 million years ago (d) 1500 million years ago (e) 3500 million years ago 2. Approximately when did the first multicellular eucaryotic organisms appear? 3. Approximately how many cells make up your body? 4. What is the approximate mass of one of your cells? 5. What length would you associate with the “width” of a typical human cell? (a) 0.00002 millimeters (b) 0.0002 millimeters (c) 0.002 millimeters (d) 0.02 millimeters (e) 0.2 millimeters VERSION A
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