Which part of the female reproductive system provides the opening for sperm to enter the body and babies to exit the body?
a. uterus
b. cervix
c. fallopian tube
d. vagina

Hand washing is an important behavior that can cut down your chances of becoming sick with a communicable disease. select the best answer from the choices provided. t f

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

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