Which bacteria is most problematic in the food industry?
pathogenic
hypoallergenic
biogenic
environmental

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?