question:
Lori owns a house next to the lake. She uses lots of fertilizer to keep her lawn green. Which impact could fertilizing her lawn have on the lake?

answer:
an increase in the algae population

question:
According to the periodic table, all of the following are metals except

answer:
fluorine

question:
Scurvy is a disease that sailors often got on long voyages. It was discovered that scurvy could be prevented by eating oranges and lemons. This suggests that scurvy is a disease caused by

answer:
a nutritional deficiency

question:
What do scientists mean when they refer to a population?

answer:
all the interbreeding members of a certain species in an ecosystem