T.W. Engelmann Experiments

Q. On which of the following organisms did Nicolas Theodore De Saussure conduct his experiment?

1. Blue green algae
2. Purple and green sulphur bacteria
3. Cladophora
4. Periwinkle

Q. Dispersion of light was achieved in T.W. Engelmann’s experiment by using

1. glass prism
2. gemstone
3. quartz
4. none of the above

Q. If Engelmann's experiment was repeated without passing light through a prism, then

1. no difference in result is observed
2. bacteria will evenly distribute along the length of the algae
3. number of bacteria would decrease due to increase in carbon dioxide
4. number of bacteria would increase due to decrease in carbon dioxide

Q.

What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

1. Bacteria released excess carbon dioxide in these areas.

2. Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.

3. Bacteria congregated in these areas because these areas had the most oxygen being released.

4. Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.

Q.

An outcome of Englemann experiment was to help determine

1. the relationship between heterotrophic and autotrophic organisms

2. the relationship between wavelengths of light and the rate of aerobic respiration.

3. the relationship between wavelengths of light and the amount of heat released.

4. the relationship between wavelengths of light and the oxygen released during photosynthesis.