The bacteria that live within the roots of a soybean plant are a critical part of the nitrogen cycle because they

Identify the predator of the lizard

What do arrows in a food chain show?

What is likely to happen to the population of insects if the population of thrushes increase?

Which is the primary consumer in this food chain? grass --> grasshopper --> frog --> hawk

Which of the following converts nitrogen in the air into a form plants can use?

Which kind of organism obtains energy only from producers?

C6H12O6 + 6O2 --> 6CO2 + 6H2O is the equation for

6CO2 + 6H2O --> C6H12O6 + 6O2 is the equation for

Plants play a crucial role in the carbon cycle because they

Through which process does carbon enter the biotic part of the environment?

What is transpiration?

If an insect eats a plant & a bird eats the insect, how much energy is stored in the insect?

Which gas is 78% of our atmosphere but can be used by plants?

In the food web diagram, which organisms are primary consumers?

Which choice correctly explains the path of energy through the food web?

What does the food chain always start with?

One way that bacteria and fungi are important to the environment is that they

Which process is NOT a way that carbon in dead organisms is returned to the carbon cycle?

A cycle that continuously moves atoms, ion, and molecules from nonliving factors to living organisms to a

Which cycle does NOT enter the atmosphere at any time?

Lightning, legumes, and bacteria are a part of the

What happens to the phosphorus stored in plants and animals when they die?

A process in the cell of an organism that uses glucose & O2 to produce CO2, H2O, and energy is called

Horses and cattle are ____ because they eat only producers

The ultimate source of energy for all organisms except those living deep in the ocean near a thermal vent is

Organisms called ? can transform unusable N2 into chemical compounds containing nitrogen that can be used by organisms

In the carbon cycle, the source of carbon for producers is the

The energy transfer in a(n) ? is more complex than energy transfer in a food chain

Bacteria and fungi are examples of a group of consumers called

A process in which energy from the sun is used to make sugar molecules is called

Oxygen is found everywhere on Earth, from Earth's crust (rocks) to the ______ where it is dissolved

Oxygen is vital for ____ by animals, a process which produces CO2 and water

Plants release 430-470 billion tons of oxygen during the process of

Oxygen is also necessary for the decomposition of ___ into other elements necessary for life

Atmospheric oxygen in the form of ____ provides protection from harmful ultraviolet rays

In the past, huge deposits of coal and oil formed from _____ plants and animals

The ______ is the main regulator of CO2 in the atmosphere because CO2 dissolves easily in it

More CO2 is released in the atmosphere today than in the past because of the

Which of the following is NOT a fossil fuel?

Higher organisms use nitrogen to make their ______

Animals and plants cannot directly use the nitrogen found in our

Our atmosphere is ___ nitrogen gas

Only 1 bacteria can use N2 in our atmosphere & "fix" it so other organisms can benefit. These are

? bacteria in the soil can break down the ammonia into N2, which is not available for use by plants & animals

Too much phosphorus in water leads to ____, strangling all other life forms in the water

Phosphorus is not found in the free state in nature, but is contained mostly in ____

Phosphorus is an essential nutrient for life, as it makes up important chemical such as

Phosphorus is an important component of animal

Phosphorus moves b/w soil & plants, then eaten. Animals ? products help return the phosphorus to soil