Astrictly fermentative bacterium produces energy
a) only in the absence of oxygen.
b) only in the presence of oxygen.
c) by fermentation or aerobic respiration.
d) by glycolysis only.
e) by aerobic respiration only.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?