Homework Help: Bio

Posted by Anonymous on Friday, November 28, 2008 at 9:02pm.

Please Check my work and help me to answer the questions i could not get.

Measure the cube that you are given. Complete the chart on the next page for your cube, then fill in the spaces for two other cubes, one measuring 1 cm on an edge and the other measuring 0.5 cm on a side. The ratio of surface area volume should be divided so that it is expressed as square cm per cubic cm.

Your Cube:
(1)Length of 1 Edge- 2.5
(2)Area of One Side- 6.25
(3)Total Surface Area- 37.5
(4)Volume- 2.5 squared
(5)Ratio of SA/Volume (reduced to /1 cc)-

1 cm cube:
(1) 1
(2) 1
(3) 6
(4)1 squared
(5)?

.5 CM cube:
(1) .5
(2) .25
(3) 18
(4) .5 squared
(5) ?

Please check the above math and help. Also:

1. If a cell is made smaller and smaller, what happens to the ratio of surface area to volume. (It Decreases?)
2. Of what value is it to a cell to have a large surface area to volume ratio?
3. How does having small cells affect the metabolic rate that is possible in these cells?

Thanks

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