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
HETEROTROPHIC
all consumers as they cannot make their own food using the sun, but depend upon the digestion of other organisms for their nutrition
INVASIVE SPECIES
is not a native to an ecosystem and causes harm because it has no natural predators
ABIOTIC FACTORS
nonliving factors such as temperature , rainfall, humidity,
BIOTIC FACTORS
living things the number of predators
FIVE KINGDOMS of all living things
monera-single celled organisms that dont have a nucleus ex. bacteria
protist-single celled organisms that have a nucleus
ex. algae, amoeba
fungi-motionless organisms that absorb nutrients for survival
ex. mushrooms mold yeasts
plant-contain chlorophyll, a green pigment necessary for photosynthesis
animal-multicelled organisms, eat food for survival, and have a nervous system
