The lactose permease transporter of E. coli can accumulate lactose inside the cell by transporting lactose in against a concentration gradient, driven by a co-transport process in which the same protein brings protons into the cell from a higher concentration outside to a lower concentration inside. A. What is the […]

Check your state Natural Heritage Program (or that of a nearby state if your state doesn’t have one) on the internet. Find one species that is threatened or endangered in your area. What kinds of factors have lead to that species being listed as threatened or endangered? What actions have […]

1) Describing how you would test the hypothesis. Start by examining the living species around you. Ever wonder why the pollinator is attracted to the particular flower, or what would happen to predator species if a certain prey species is removed? If you were a scientist you would do an […]

1. The genes for ruby eyes (rb), tan body (t) and cut wings (ct) are all found on the X-chromosome of Drosophila melanogaster. All of these are recessive traits. They map in the order rb, ct, t with 12.5 map units between rb and ct and 7.5 map units between […]