Vaccines are used for viral infections because

a) teach the body how to digest viruses in the intestines and dispose of them in waste (like feces)

b) vaccines are for bacterial infections not viral.

c) teach the memory b cells how to fight off infections

Type the correct answer in the box. use numerals instead of words. fiona has a lovely flower bed in her yard. she wants to add a fence along one side of the flower bed. the fence material is sold in meters. fiona knows that her flower bed is 200 centimeters in length. how much fencing material does fiona need in meters? fiona needs meters of fencing material for her flower bed.

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear