What was the variable in Pasteur's experiment?
A. meat sealed in jars that didn’t have contact with air
B. a swan neck flask that prevented air from getting in
C. uncovered meat that had contact with air
D. a straight neck flask to allow air to get in

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle