If an outdoor runner develops a headache, feels tired, and has an elevated heart rate, what is the most probable cause?
a. insufficient calories
b. overhydration
c. dehydration
d. lack of protein

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials