Primary consumers can be eaten by secondary consumers, thus a secondary consumer would be a:

Several things that affect the birth/fertility rates of different populations were covered in this course. Which of these tends to cause an increase in birth/fertility rates in a population?

What is the primary source of mercury produced by humans activities?

A community is comprised of all of the different species of organisms interacting with each other in a given area.

A macronutrient is a nutrient that is needed in relatively large amounts by organisms.

According to the Law of Matter, the amount of matter put into a system is always more than the amount of matter that comes out.

According to the Law of Matter, the amount of matter put into a system is always more than the amount of matter that comes out.

The richest 20% of the world’s human population consumes approximately what percent of the Earth’s resources?

What is the single largest source of carbon dioxide being added to the atmosphere every year?

What compound is now used as the primary replacement for CFCs?