Biology 1306

Fall 2010

  Extra credit worksheet #1 -Due at the beginning of the first exam


1.         Circle all numbers below indicating an acid pH.


            4.23            9.70            5.99            0.13            2.00            11.23            6.96            13.99           7.00            5.89


2.            Arrange the pH values in question one from most acidic to least acidic


            ____            ____            ____            ____            ____            ____            ____            ____            ____            ____


3.         How many micrograms (mg) would there be in 4.23 kilograms (kg)?  (Show all work to receive







4.         How many micrograms (mg) are there in 0.37 kg?  (Show all work to

receive FULL CREDIT!!)








5.         How many nanograms (ng) are there in 207 mg?  (Show all work to receive full







6.            Express the number 62,374 using scientific notation.


7.            Express the number 3 using scientific notation.


8.            Express the number 0.0371 using scientific notation.


9.            Express the number 0.000037 using scientific notation.


10.            Express the number 3,622,000 using scientific notation.





 Biology 1306 –Fall 2010

Extra Credit Sheet #2 - Surface Area to Volume Ratio & Photosynthesis



1.         (2 pts.) A cell, 4 mm x  4  mm x 4  mm, has a surface area of____________










            (1 pts.)  The same cell would have a volume of_______________   








(2 pts.)  What would be the surface area to volume ratio of this cell?______________

            (remember a ratio is always simplified to something to 1, i. e. 8:1, 1.5:1, etc.)








2.         (4 pts.)  A skin cell is thinner than the iso-diameter cell in problem #1.  If the cell has the dimensions of 1 mm x 3 mm x 4 mm,


What would be the surface area of this cell?_____________












(1 pts.)  What would be the volume of the cell?_____________









(2 pts.)  What would be the surface area to volume ratio of this cell?___________








3. (3 pts.)  You have two plants and you place one plant in normal room light and the other under green light.  Would you expect them to look similar or different after two weeks time.  Explain your answer.


Biology 1306-General Biology I

Fall 2010

Bonus sheet #3



 BONUS.  (Possible 20 points).  Work, when necessary, must be shown to get all points possible.

For each of the diploid genotypes presented below, determine the genetic make up for all of the possible haploid gametes. NOTE: you will not necessarily have something in every square in the table below

Diploid genotype                


2.         Use the Punnett square to determine all of the offspring genotypes (and their relative frequencies) from the following crosses:

a. Rr x Rr





b. RrBBDd x RrBbdd





c. RRDd x Rrdd







3.         In sheep, white is due to a dominant gene (W), black to its recessive allele (w). A white ewe (1) mated to a white ram (2) produces a black lamb (3). If they produce another offspring, could it be white? If so, what are the chances of it being white? List the genotypes of all animals mentioned in this problem.











4.         In dogs, there is an hereditary deafness caused by a recessive gene, “d.” A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, so the owner knows his genotype is either DD or Dd. If the dog’s genotype is Dd, the owner does not wish to use him for breeding so that the deafness gene will not be passed on. This can be tested by breeding the dog to a deaf female (dd). Draw the Punnett squares to illustrate these two possible crosses. In each case, what percentage/how many of the offspring would be expected to be hearing? deaf? How could you tell the genotype of this male dog? Also, using Punnett square(s), show how two hearing dogs could produce deaf offspring.