Heart been broke so many times I Don't know what to believe
Mama say it's my fault, it's my fault I wear my heart on my sleeve
Think it's best I put my heart on ice, heart on ice
'Cause I can't breathe

Free points

Health and cardio respiratory fitness occurs when the heart is working, at minimum, 50 percent of heart rate reserve. true or false

Which action is most likely to contribute to a positive self-image?

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