all terms Flashcards
bio chimie physique (44 cards)
movement
an action by an organism causing a change of position or place
sensitivity
the ability to detect and respond to changes in the environment
growth
a permanent increase in size
reproduction
the process that make more of the same kind of organism
excretion
removal of excess toxic waste and substances from organisms
nutrition
taking in of materials for energy growth and development
egestion
passing out food that has not been digested as faeces
absorption
the movement of digested food molecules through the wall of the intestine into the blood
food web
a network of many food chains
food chain
a diagram showing the flow of food from one organism to the next beginning with a producer
asexual reproduction
genetically identical offspring made from one parent
catalyst
a substance that increases the rate of a chemical reaction and isn’t changed by the reaction
carnivore
an animal that get energy from eating other animals
consumer
organism that gets energy by eating other organisms
respiration
the chemical reactions in cells that break down nutrient molecules and release energy
decomposer
an organism that gets its energy from dead or waste organic matter
digestion
the breakdown of large insoluble food molecules into small water-soluble molecules using mechanical and chemical processes
diffusion
net movement of molecules and ions from a region of higher concentration to a region of lower concentration down a concentration gradient as a result of their random movement
gravitropism
plant growing towards or against gravity
herbivore
an animal that gets energy from eating plants
hormone
a chemical substance made by a gland carried by blood that alters the activity of one or more specific target organs and is then destroyed by the liver
ingestion
taking substances into the body through the mouth
mutation
a change in gene or chromosome
pollination
transfer of pollen grains from male part (anther of stamen) to female part (stigma)
