Table B: Feeding Results of the Second Generation Flock x
Flock Y
Flock Z
Insects Eaten
Seeds Eaten
Fruit Eaten
Total Pieces of Food Eaten
Percentage of Food Eaten*
(Total = 300)
(Total = 100%)
(Total birds = 30)
Simulated Number of Birds
in Flock for 3rd Generation **
* Divide each flock's total pieces of food by 300, the total number of pieces of food eaten.
** Multiply the food percentage for each flock by the total number of birds (students).
I

How do cells grow and reproduce to maintain homeostasis?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?