Composition 14 Flashcards
FOOD CHAIN
represents a succession of organisms that eat another organism and are in turn eaten themselves
TROPHIC LEVEL
the position it occupies in a food chain
DECOMPOSTION
the state or process of decay
nutrients are released for other organisms
FERTILIZER
a chemical or natural substance added to soil or land to increase its fertility
HABITAT
food, cover, and water
the key to survival of wild life an population size
INTERNAL STIMULI
cues responsible for many adaptations of behavior, structure, form, etc
include hunger, thirst, hormones
EXTERNAL STIMULI
cues responsible for many adaptations of behavior, structure, form, etc
include presence or absence of heat or light
FOOD WEB
diagram that combines many different food chains together
FOOD CHAIN
chart that shows how organisms are dependent of one another for food in different energy levels
composed of
1.producers-make own food are mostly plants
2.primary consumers-herbivores
3.sencondary consumers-first level of carnivores eat herbivores
4.tertiary consumers-eat carnivores and decomposers refer to fungi and bacteria
PRODUCERS
organisms , like green plants, that produce organic compounds from inorganic compounds
AUTOTROPH
an organism that makes its own food from inorganic substances
CONSUMER
the organisms that obtain nutrients from other organisms
DECOMPOSER
an organism of decay
SAPROBES
they break down the remains of dead animals and plants, releasing the substances that can be used by other members of the ecosystem
OMNIVORES
organisms capable of functioning as primary consumers(eating plant material) and as sencondary consumers(eating animal material)
ex. humans
