photosysnhesis question?

Question

1.Your neighbor just bought a new set of tires. He sets the old tires in the grass beside his driveway until his neighborhood trash collection day. Five days later the tires are removed on trash pick-up day. As you arrive home, you can see exactly where the tires had been.


1.What would you observe about the grass in order to tell where your neighbor had left his tires?
2. Why would the grass have appeared as it did? Explain in terms of the processes of photosynthesis.

Answer 1

1. The grass would be discolored where the tires had been.
2. The tires covered the grass, blocking the grass from absorbing sunlight, which is necessary in photosynthesis. Since the grass couldn't photosynthesize it wouldn't get the proper nutrients so it would die, thus changing its color.

Answer 2

Likely, the grass would be very pale or even white underneath the tires. Chloroplasts are the only green thing in grass and leaves. Chloroplasts require light in order to stay functioning. In the dark, chloroplasts don't develop and those that were there degrade, so the blades of grass become very pale or even colorless.

Answer 3

1. the mark of tires are on the grass and the grass is brown
2. the grass appears that way because the grass didn't have adequeate sunlight so it could absorb the light to start the photolysis section

Answer 4

1- The grass would be brown because it died.
2- it would be brown because it didnot had any source of sunlight, therefore no photosynthesis. No photosynthesis, no food, therefore no plant life.