Science Quiz / AQA GCSE B1 Definitions

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Can you name the key definitions for AQA GCSE Biology 1?

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MeaningKey Term
All of the chemical reactions in your body.
Someone suffers from this when they have an unbalanced diet.
When someone is excessively overweight. Can lead to Type 2 Diabetes.
A waxy substance found in animal tissues. The liver makes it from saturated fats. It's used to strengthen cell membranes and it also makes sex hormones and vitamin D.
Drugs taken to reduce the amount of cholesterol the body makes.
A harmful microorganism that causes disease (virus or bacteria).
A small, living microorganism that reproduces rapidly. Not all are harmful, but some produce toxins. They can be killed by antibiotics.
Harmful, non-living microorganisms that can cause disease. They reproduce by hijacking host cells to make copies of themselves. They can be killed by antivirals.
Drugs that can alleviate symptoms of a disease/illness but do not actually kill the disease/illness.
A dangerous infection that is resistant to Methicillin, a very strong antibiotic.
White blood cells that engulf/ingest pathogens.
White blood cells that produce antibodies.
A type of protein made by white blood cells that destroy a particular type of bacterium or virus.
A protein of a specific shape that can be found on a pathogen.
The process by which a dead/inactived form of a disease is injected into the body so that the person cannot catch that disease again.
The part of the nervous system that comprises of the brain and the spinal cord.
The part of the nervous system that comprises of nerves taking information to and from effectors and the spinal cord or brain.
Actions that are coordinated by the spinal cord and do not involve the brain.
Glands or muscles that carry out a response.
The gap between two nerves.
The chemical messenger that is released from the nerve endings of a neuron in order to cross a gap between two nerves.
Chemicals that co-ordinate long term changes (such as puberty). They are secreted by glands and travel in the bloodstream.
The hormone in the menstrual cycle that coordinates the maturing of one egg a month and stimulates the production of oestrogen. It is secreted from the Pituary Gland.
The hormone involved in the menstrual cycle that repairs the uterus lining after menstration and inhibits FSH. It is secreted from the Ovaries.
MeaningKey Term
The hormone in the menstrual cycle that triggers ovulation.
The hormone in the menstrual cycle that maintains the uterus lining and inhibits FSH. It is made in the ovaries.
The hormones used in contreceptive pills.
Hormone taken to improve fertility.
The process by which an egg is extracted from the mother and fertilised in a lab.
Changes in the environment around us.
A plant's response to stimuli.
A plant's response to gravity.
A plant's response to light.
Plant hormones.
A chemical that alters the way your body or brain functions.
The unpleasant physical response to stopping taking an addictive drug.
A drug that was originally developed for insomnia but was then used for pregnant women to stop morning sickness. It was found to cause the foetus to be born with deformed limbs.
A substance that is made to look like a drug but doesn't actually contain the drug.
A method of testing drugs in which there are two groups of patient. Only one group of patients takes the drug, but the doctors and patients don't know who is taking it.
An organism's features that help it to survive in its environment.
Organisms that are adapted to challenging/extreme conditions.
Organisms that are adapated to extreme heat.
The numbr of organisms of a particular species in a named area.
A variable like temperature or pH that can be measured and used to indicate pollution levels.
A species that, if present in an environment, can indicated pollution levels.
Where an organism is found
Square frames of a known size that are used to sample species in a particular area.
A tape placed across a habitat/part of a habitat. The number of organisms of each species can be observed and recorded at regular intervals.
MeaningKey Term
The dry mass of an organism.
A pyramid that indicates how many organisms there are in a food chain.
A pyramid that shows the biomass of species in a food chain.
A method of farming used to minimise energy loss often by keeping animals in crampt conditions in heated barns.
The process by which elements in dead bodies are released back into the soil for plants to reuse.
Organisms that eat small parts of the dead animal/plant, which they digest and excrete.
Organisms, usually bacteria or fungi, that chemically break down dead material and release ammonia into the soil.
The process by which organisms involved in decay release enzymes onto dead material which digest it for the organisms to then absorb it.
The process by which carbon enters and leaves the atmosphere.
Thread-like structures found inside the nucleus. Human body cells have 23 matching pairs. Gametes have only 23 of them.
Short sections of DNA that code for characteristics of the body.
Reproduction involving two parents and fusion of DNA, leading to genetic variation.
Sex hormones (sperm and egg).
Reproduction involving only one parent and identical offspring.
The process by which small groups of cells are extracted from part of a plant and grown in a special liquid/jelly.
The process by which eggs are taken from an organism, fertilised in a dish, allowed to develop into eight cells, then split into four 2-cell embryos and are put in host mothers.
The process by which an unfertilised egg cell it taken and has its nucleus destroyed. A body cell's nucleus is implanted in the egg and a spark of electricity makes it divide.
The process by which an organism's genes are altered by using enzymes to manipulate genes.
Crops that have their genes altered in order to make them either resistant to pests or weedkillers, increase their yield or increase their nutritional value.
The gradual change of an organism over time.
The man who came up with the above theory.
The process by which organisms that are best adapted to their habitat survive and pass on their characteristics.
The man who came up with an alternate theory as to how organisms changed. He proposed that organisms passed on characteristics they had obtained in their lifetime.

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