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Biology Key Terms

Junior cert biology

Nutrition the way an organism gets its food
Respiration the release of energy from food
Excretion the removal of waste from the body
Reproduction the formation of New Organisms
Movement the organism moves
Response reacting to changes in the surroundings
Invertebrates animals that DONT have a backbone
Vertebrates animals that have a backbone
Tissue a group of cells which carry out the same function
An organ a structure that contains 2 or more tissues working together
A system a number of organs working together eg digestive system
Digestion the breakdown of food
Enzyme a protein that speeds up a reaction WITHOUT being used up eg. almayse
Product the substance produced as a result of the action of an enzyme eg. maltose
Substrate the substance that an enzyme acts upon
Joint where bones meet
Tendons join muscles to bone
Ligaments join bone to bone
Antagonistic pair 2 muscles which carry out opposite effects eg. biceps and triceps
Cartilage protects the ends of bones
Neuron a nerve cell
Puberty the age at which people reach sexual maturity
Menstrual Cycle a series of changes that take place in the female body every 28 days
Ovulation The release of an egg from the ovary
Fertilisation the joining of the male and female gamete to form a zygote
Implantation the attachment of the embryo t the lining of the uterus
Pregnancy the carrying of an embryo in the uterus
Contraception the prevention of fertilization or pregnancy eg abstinence
Genetics the study of how traits or characteristics are inherited
Chromosomes Thread like structures made of DNA and PROTEIN found in the nucleus of the cell
Transpiration the loss of water vapour from a plant
Xylem tissue that transports water
Phloem tissue that transports food
Photosynthesis the way in which green plants make food
Tropism the change in growth of a plant in response to a stimulus
Geotropism the change in growth of a plant in response to gravity
Asexual Reproduction New individuals are formed from only one parent
Runners a method of asexual reproduction in plants
Pollination the transfer of pollen from a stamen to a carpel
Dispersal the carrying of the seed as far as possible from the parent plant
Germination the growth of a seed to form a new plant
Ecology the study of the relationships between plants animals and their environments
Ecosystems All the plants and animals in an area interacting with each other and their environment
Habitat the area where a plant or animal lives
Producers plants that make their own food
Consumers animals that get their food by eating plans or other animals
Herbivore an animal that eats plants only
Carnivore an animal that eats other animals only
Omivore an animal that eats both plants and other animals
Decomposer organisms that feed on dead plants and animals
Competition takes place when 2 or more organisms require something that is in short supply
Food Web 2 or more interconnected food chains
Interdependence living things depend on each other for survival
Conservation the protection and wise management of natural resources to prevent living things becoming extinct
Pollution the addition of unwanted materials to the environment
Microbiology the study of small living things
Created by: jojo1979
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