Which of the following is NOT a characteristic of a living thing?

A field of sunflowers facing towards the sun is an example of

If an organism divides and produces an exact copy of itself, the organism

Fish, their predators, and the water, sunlight, and plants that they rely on would be considered a(n) .

A group of eagles living around Lake Tahoe would be considered a(n) .

Nitrogen in the air must be "fixed" before it can be used by plants. Atmospheric nitrogen is "fixed" by

When deforestation (cutting down trees) occurs in an area, what immediate effect does this have on the water cycle?

The main result of photosynthesis is

Bacteria are involved in many steps of the biogeochemical cycles. Which of the following steps is bacteria NOT involved?

Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?

What is one biotic factor that affects the size of a population in an ecosystem?

Organisms, such as plants or phytoplankton that carry out photosynthesis, would cause a decrease of which gas in the atmosphere?

In the carbon cycle, decomposers return carbon to the soil. Which of the following is NOT something that decomposers can break down?

Humans increase carbon dioxide (CO2) in the atmosphere, and contribute to the carbon cycle by

For the carbon cycle and the nitrogen cycle to function properly, which organisms must always be present?

Water can be returned to the atmosphere through the leaves of plants by

Which of the following is true of density-dependent limiting factors?

Conditions in the environment that impact the size of the population are called

Which factor is a density-dependent limiting factor on the population of a species?

A population of mice occupies a tree stump. For ten years, the population has been stable. Which of the following would likely cause the number of mice to begin to decrease?

What pattern of growth will a population with limited resources show?

All living things maintain a balance within their cells and with the environment through the process of

The four main types of macromolecules found in organisms are carbohydrates, lipids, nucleic acids, and

Which characteristic is not common to both prokaryotic cells and eukaryotic cells?

By the end of prophase, all of the following has occurred EXCEPT

Photosynthesis occurs in two stages: light-dependent reactions and light-independent reactions. During the light-dependent reactions,

At the beginning of cellular respiration ____________________________ occurs, where glucose is broken down into pyruvate and ATP. This step does not require any oxygen.