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

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

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

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

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

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

What is the main biological use of magnesium?

Which of the following are biological uses of phosphorus?

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

What gas causes ocean acidification?

Which of the following definitions pertains to the process of uptake?

Which processes below cause the release of energy as heat from a food chain?

What process moves nutrient rich deep water to the surface of the ocean?

What process occurs as nutrient rich water flows off land into the ocean?

What does the letter A represent in the diagram?

What does the letter B represent in the following diagram?

Why can't phytoplankton or plants survive the environment surrounding a hydrothermal vent?

What percentage of energy is transferred between a producer with 45,000 kJ/m2/yr of energy and primary consumer with 2500 kJ/m2/yr of energy?

Which of the following organic molecules contain nitrogen?

What is the first thing you should always do when constructing a graph?

What negative consequence could be the result of excess nutrient runoff from land?

What word describes all the individuals of a single species living in an area?

Which word describes an organism's biotic and and abiotic environment?

What term describes the feces and decaying matter that sink and bring nutrients to the deep ocean?

Why does productivity decrease in the fall and winter months in the northern hemisphere?

What is the primary source of energy for most food webs on planet Earth?

What process occurs at hydrothermal vents to anchor the food chain?

What word best describes the relationship between corals and zooxanthellae?

Killer whales can eat a wide variety of prey items. What type of niche do killer whales fill?

Which major holiday wasn't made an official holiday for all federal employees until 1968?

Which Star Wars character wields a double-bladed lightsaber in Star Wars Episode I?

Which zodiac sign corresponds to the dates July 24 - August 23?

What famous novel begins with the line, "Call me Ishmael."

What US President set the record for shortest time served in US Presidential history when he died of pneumonia only 32 days after being sworn in?