What is the primary function of typical leaves?  

What are the two classes of poisons produced by pathogenic bacteria?  

Which explanation is most likely for a particular human population with a higher incidence of polydactyly (extra fingers/toes) than the human population as a whole?  

You arrive back in the United States after having visited a foreign country located on another continent. The customs agent stops the person in front of you and confiscates the fruit basket this person is bringing home. Being the knowledgeable person you are, you calmly explain to your enraged fellow traveler that the reason for the detainment is that the fruit basket may be ________.  

Food poisoning from Salmonella occurs because of ________.  

What best describe(s) the dependencies of most flowering plants?  

Which prokaryotic group is most closely related to eukaryotes?  

Which mode of nutrition characteristic distinguishes animals from other eukaryotes?  

The greenhouse effect causes an increase in global temperatures. This increase is due primarily to ________.  

Which group of organisms is most closely related to plants?