You measure mercury levels in fish across three years and find a downward trend. What might this indicate?

In an urban pond, fertilizer runoff leads to algae blooms. Which cycle is most affected?

What is the role of the independent variable in an experiment?

What kind of trees do softwoods come from?

A diagram shows that oxygen levels are lowest in July. What’s the likely cause?

Your biomass calculations show you need 10 kg of secondary consumers. How much biomass is needed at the producer level?

If a family asks for the most premier hardwood casket you have, you would direct them to:

A student observes that trees near a parking lot are shorter than those farther away. What is the dependent variable?

What is the best metric unit for measuring the thickness of an eggshell?

What kind of trees do hardwoods come from?