Select the best response from the drop-down menus. are the main transportation system to send oxygen to the tissues and organs in the body.

serve as the body’s defense system against infections and other diseases.

Energy needs, in total kilocalories per day, are greater during than any other time of life. a. childhood b. infancy c. adulthood d. adolescence

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

1. controls how much sugar is in the blood pancreas 2. controls the other glands pituitary gland 3. manufactured by the brain to relieve pain thyroid 4. gland that regulates the body's energy levels endorphins