Which is a trigger for asthma attacks?
a: air pollution
b: lack of vitamin d
c: bacterial infection
d too much sugar

What is the hormone in your brain that makes you feel happy?

Aresearcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (tmv). the cell contents are left in a covered test tube overnight. the next day this mixture is sprayed on tobacco plants. we expect that the plants would ) develop some but not all of the symptoms of the tmv infectionb) develop the typical symptoms of tmv infectionc) not show any disease symptomsd) become infected, but the sap from these plants would be unable to infect other plants

Whihc type of medicine kills cancer cells in the body, but also kills healthy cells