Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 3 sec2-4

Autotroph any organism capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy, as most plants and certain bacteria and protists.
primary producer any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
photosynthisis the complex process by which carbon dioxide, water, and certain inorganic salts are converted into carbohydrates by green plants, algae, and certain bacteria, using energy from the sun and chlorophyll.
chemosythisis the synthesis of organic compounds within an organism, with chemical reactions providing the energy source.
heterotroph Biology. an organism requiring organic compounds for its principal source of food.
consumer a person or thing that consumes.
carnivore an animal that eats flesh.
herbivore a herbivorous animal.
scavenger an animal or other organism that feeds on dead organic matter.
omnivore someone or something that is omnivorous.
decomposer an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substance
detritivore an organism that uses organic waste as a food source, as certain insects.
Food chain a series of organisms interrelated in their feeding habits, the smallest being fed upon by a larger one, which in turn feeds a still larger one, etc.
phytoplankton the aggregate of plants and plantlike organisms in plankton.
food web a series of organisms related by predator-prey and consumer-resource interactions; the entirety of interrelated food chains in an ecological community.
zooplankton the aggregate of animal or animallike organisms in plankton, as protozoans.
trophic level any class of organisms that occupy the same position in a food chain, as primary consumers, secondary consumers, and tertiary consumers.
ecological pyramid
biomass the amount of living matter in a given habitat, expressed either as the weight of organisms per unit area or as the volume of organisms per unit volume of habitat.
biochemical cycle Any of the natural pathways by which essential elements of living matter are circulated.
nutrient providing nourishment or nutriment.
nitrogen fixation any process of combining atmospheric nitrogen with other elements, either by chemical means or by bacterial action: used chiefly in the preparation of fertilizers, industrial products.
denitrification to remove nitrogen or nitrogen compounds from
limiting nutrition The nutrient in short supply relative to the others will be exhausted first and will thus limit cellular growth.
Created by: The Mamba