SCIENCE REVISION T2 BIOLOGY 2025 Flashcards
(28 cards)
biosphere definition
the ecosystem comprising the entire Earth and the living organisms in it
carnivore definition
meat eating mammals, generally with large canine teeth
Chlorophyll definition
green colouring matter of leaves and plants, necessary for the process of photosynthesis
Adaptation
an alteration in the structure and function of an organism to better fit it for its environment
food web definition
the entirety of interrelated food chains in an ecological community
biome definition
a biotic community with distinctive plant and animal species
ecosystem definition
a system formed by the interaction of a community of organisms
decomposer definition
an organism, often bacterium or fungus, that breaks down the cells of dead material
ecology
the branch of biology concerned with the relations between organisms and their environment
food chain definition
a series of organisms interrelated in their feeding habits, a chain from food source to the ultimate consumer
Phytoplankton definition
algae and single celled organisms that make up the beginning of the food chain for aquatic animals
habitat definition
the natural environment of an organism
photosynthesis definition
the synthesis of carbohydrates from carbon dioxide and water using sunlight
Primary (first order) consumers definition
an animal that feeds mainly on plants; in food chains, herbivores are primary consumers
Omnivores definition
an organism that eats both plants and animals
Niche definition
the specific position of an organism in a community
Secondary (second order) consumers definition
an organism that eats first order consumers, e.g. a snake (second order consumer) that eats mice (first order consumer)
Producers
an organism (plant) that is able to produce its own food from inorganic substances
herbivore definition
an animal that feeds on plants
Tertiary (third order) consumers
an organism that eats second order consumers, e.g. an owl (Third order consumer) that eats a snake (second order consumer)
prey definition
an animal hunted as food
predator definition
any organism that exists by preying upon other organisms
what are the 3 domains
bacteria
Eukarya
Archae
what are the 6 kingdoms
animalia
plante
protista
eubacteria
archebacteria
fungi
