What is the proper way to plot points on a graph?

• Dots with circles around them

• Dots

• Xs

• Xs with circles around them

What word describes an organism's role in an ecosystem?

• Productivity

• Community

• Niche

• Function

What is calculated by subtracting the minimum value from the maximum value?

• Range

• Mode

• Median

• Mean

Which type of variable is changed by the scientist at the beginning of an experiment?

• Constant

• Uncontrolled

• Dependent

• Independent

Which type of variable is measured by the scientist during an experiment?

• Dependent

• Uncontrolled

• Independent

• Intervening

A scientist is determining the effect of temperature on feeding rates of snails. Which variables should be held constant?

• Salinity

• Temperature

• pH

• The species of snail used

Why do organisms on coral reefs tend to have specialized niches?

• Prevents diseases

• Reduces competition between species

• Enhances productivity

• Allows for more competition between species

What is the main biological use of magnesium?

• Bones and teeth

• Lipids

• Chlorophyll

• ATP

Which of the following are biological uses of phosphorus?

• Bones

• Proteins

• Cell membranes

• ATP

What is one main anthropogenic (from humans) source of nitrogen in the ocean?

• Pig farm runoff

• Burning fossil fuels

• Upwelling

• Fertilizer runoff