Which kind of tumor grows slowly and is surrounded by membranes that prevent it from spreading from the original site? a. benign b. metastasisc. malignant

Which can be an effective way to reduce stress? a) getting in the habit of doing things perfectly the first time b) engaging in a fun physical activity on a regular basis c)taking an antacid for a stress-based stomachache d)studying extra hard the night before a test

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

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