Arial decides to ride her bike to work instead of driving her car. what impact is this decision likely to have on the environment? a. more energy resources will be required. b. contamination of nearby land will be reduced. c. the global footprint of people in the us will increase. d. less carbon dioxide will be released into the atmosphere.

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. what area of the spinal cord is destroyed

All other things being equal the size of a population will decrease if