Nutrient Cycling

Chemical process that animals and plants use to obtain energy.

• Transpiration

• Respiration

• Photosynthesis

• Percolation

• Denitrification

What words would accurately describe the grass in this food chain?

• autotroph & producer

• heterotroph & consumer

• autotroph & consumer

• primary consumer & producer

How much energy would be available to the snakes in the 4th trophic level?

• 10 kcal

• 100 kcal

• 1,000 kcal

• 10,000 kcal

On average, what percentage of taken in by one trophic level is available to be passed on to the next trophic level?

• 10%

• 50%

• 90%

• 100%

What happens to 90% of the energy eaten by the organisms in a trophic level? Check all that apply

• It can be used to do cellular respiration and create ATP

• It can be excreted out through feces

• It can be converted into heat

• It can be put into the soil by decomposers

What do we call organisms that break down dead materials outside their bodies and absorb the nutrients from the broken down material?

• producers

• carnivores

• detrivores

• decomposers

What happens if a population grows past its carrying capacity?

• The population keeps growing

• The population starts to die off

• The entire species will go extinct

• The carrying capacity just increases

Which of these is an abiotic factor?

• Bacteria

• Sunlight

• Worms

• Algae

What impact do the amounts of available energy, water, and oxygen have on an ecosystem?

• They act as limiting factors.

• ]They are used as nutrients.

• They recycle the residue of dead organisms.

• They control environmental temperature.

An environment can support only as many organisms as the available energy, minerals, and oxygen will allow. Which term is best described by this statement?

• biological feedback

• carrying capacity

• homeostatic control

• biological diversity