Sympatric speciation is: O a. The appearance of a new species in the same geographic area as the parent population O b. Initiated by the appearance of a geographical barrier С. The process by which most animal species have evolved O d. Initiated by rapid events rather than gradually e. The emergence of many species from a single ancestor

If Sarah 74 kg walks for 32 minutes at 0.6 miles per hour on a level track ( 1% grade), how many calories will she "burn"? (no decimal places)

Motor neuron 1. 4 Muscle fiber nucleus Myofibril of muscle fiber Figure 10.15. Details of the neuromuscular junction. O bluedoor, LLC

9 12 15 Which of the following is the voltage sensor that most directly leads to an increase in cytoplasmic Ca++ in skeletal muscle? оо DHP/Ryanodine receptor, Ca++ pump in sarcoplasmic reticulum Ca++ pump in plasma membrane K+ channel Both B and C