LAB 2 Answers

LAB 2 Answers - LAB 2 BACTERIA PROTISTA AND FUNGI Answers...

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LAB 2 BACTERIA, PROTISTA, AND FUNGI Answers to questions in the lab exercise: Examine Spirillum volutans . What is the bacterium’s shape? The spirillum type. You see spirally-curved rods. Can you find the cell wall or the nucleus? Yes, almost all bacteria have cell walls. It is the outermost layer, outside of the plasma membrane. No, there is no nucleus. A nucleus is an organelle and bacteria do not contain organelles. How many flagella are visible at each end? You can see either 2 or 3 flagella. Explain how a lake overpopulated with oxygen producing algal growth could experience low levels of oxygen. At certain times of the year, such lakes experience fish kills. That is, large numbers of fish die and the lake is said to be “polluted” or “dying”. When algae grow very abundantly and reach very high population levels, they will eventually begin to run out of food. When this occurs, they start to die in great numbers and the decomposition of the dead algae uses up the oxygen. The water can then
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This note was uploaded on 11/02/2011 for the course BIOL BIOL 111 taught by Professor Roffey during the Fall '09 term at McGill.

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LAB 2 Answers - LAB 2 BACTERIA PROTISTA AND FUNGI Answers...

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