Science Quiz / AQA GCSE Science A Biology Key Words

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Plant growth response to a stimulus.
A substance that prevents conception (getting pregnant).
Disease caused by not eating enough of a particular nutrient e.g. Scurvy from too little vitamin C.
Structure inside an organism that makes a useful substance, often a hormone.
Organ such as a gland or muscle that responds to a stimulus.
Chemical, usually made by fungi or bacteria, that can be used as medicine to kill other fungi or bacteria.
Single-celled microorganism, 1-5 μm long. They do not have DNA enclosed inside a nucleus.
Medicinal drugs that reduce the amount of cholesterol made by the body.
The scientist who believed in the inheritance of acquired characteristics e.g. the giraffes’ stretched neck.
The ability some bacteria develop meaning that an antibiotic will not kill them anymore.
Being very overweight.
Hormones produced in the sex organs (ovaries and testes).
Produce a hormone in special cells of a gland.
Removing the nucleus from an unfertilised egg and replacing it with the nucleus from another cell taken from an adult organism. The new cell can develop into a new organism.
Sudden outbreak of a disease that affects many people within a country.
Cell specialised to carry electrical impulses. Nerve cells.
Change in the structure of a gene. This may results in a different characteristic being developed.
Your body’s system that fights infections, involving white blood cells and antibodies.
The survival of organisms better adapted to their environment.
Special protein in the body that can bind to a particular antigen and destroy a particular pathogen.
Chemical made by a gland and carried in the blood to its target organ(s).
The scientist who came up with the theory of evolution through natural selection.
Cell or sense organ that detects stimuli.
Very infectious pathogen. Can only reproduce inside a host cell.
A female sex hormone involved in regulating the menstrual cycle.
How you feel when you have a disease e.g. headache, nausea.
Organ or part of the body that responds to a particular hormone.
Small gap between neurones, or between a neurone and effector.
Nerves carrying information from sense organs in the body to the CNS, and from the CNS to effectors.
Monthly cycle in adult females.
Medical procedure that involves injecting dead or inactive pathogens into a patient to stimulate the body to create antibodies.
Diet that has the right amount of proteins, fats, carbohydrates, vitamins, minerals, water and fibre, and gives you enough energy.
A female sex hormone involved in maintaining the uterus lining.
Sorting organisms into groups (e.g. kingdoms) according to their characteristics.
Small organisms, seen under a microscope e.g. bacteria and viruses.
All the chemical reactions going on in cells.
Fast automatic response of the body to a potentially dangerous stimulus, coordinated by the spinal cord.
Group of organisms that are similar and capable of producing fertile offspring.
Special protein on the surface of pathogenic cells. Bind matching antibodies during the immune response.
A plant hormone that causes shoots and roots to bend.
Epidemic that sweeps across continents or the whole world.
Drug that stops you feeling pain e.g. paracetamol.
How quickly all the reactions are going on in cells.
Change in the environment, such as a temperature change, that you respond to.
A microorganism that can cause an infectious disease.
Fertilisation carried out outside the body, so the egg and sperm join in a glass dish to form an embryo that is injected back into the women’s uterus.
Biological catalyst made of protein. They speed up chemical reactions in living organisms.
After you have made antibodies to a pathogen, you are able to fight off the pathogen in future without getting ill.
Release of a mature egg from an ovary.

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