4th Form Definitions And Key Concepts Flashcards
Population
The total number of individuals of one species in a particular habitat at a particular time.
Community
An interacting group of various species in a shared/common location/ that live within a habitat.
Habitat
The places where specific organisms live.
Ecosystem
ACOLO,NLTATSE
A community of living organisms (animals, plants, micro-organisms), non living things and their shared environment.
Consumer
Organisms which eat other living things (e.g. animals)
Producer
Organisms which make their own food (e.g. photosynthesising plants)
Quadrat
AFUIETMTSOAPIAH
A frame used in ecology to measure the size of a population in a habitat
Diffusion
The movement of particles from a high to low concentration.
Active transport
The movement of particles from a low to high concentration.
Osmosis
MOWFAAOHWP TAAOLWP AAPPM
The movement of water from an area of high water potential (high water concentration) to an area of low water potential (low water concentration) across a partially permeable membrane.
Transpiration
The loss of water by evaporation from the leaves of plants
Excretion
The removal of metabolic waste products (and substances that are toxic or in excess)
Osmoregulation
The process of maintaining water and salt concentrations (osmotic balance) across membranes within the body
Trophic levels
Position an organism occupies within feeding sequence
Primary consumer
Herbivores that feed on Plants (Producers)
