Biology key words

All the important words/phrases for iGCSE biology. Only dual award so may miss some triple words.

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  • Created by: CoolKid
  • Created on: 26-03-13 11:37
The movement of substances against a concentration gradient.
Active Transport
1 of 43
The hormone which controls the selective reabsorbtion of water in the kidney.
ADH
2 of 43
A version of a particular gene.
Allele
3 of 43
Plant hormones involved in controlling the phototropisms.
Auxins
4 of 43
Green pigment in chloroplasts capturing light energy.
Chlorophyll
5 of 43
Offspring produced by asexual reproduction.
Clone
6 of 43
Two alleles which are both expressed in the phenotype of an organism.
Codominance
7 of 43
Organisms that feed on other organisms.
Consumers
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Microorganisms that bread down waste and dead products.
Decomposers
9 of 43
The breakdown of an enzyme when too hot or in different pH.
Denatures
10 of 43
The movement of particles from an area of high concentration to an area of low concentration.
Diffusion
11 of 43
Having two sets of chromosomes in the nucleus of the cells.
Diploid
12 of 43
The spreading of seeds away from the parent plant..
Disperse
13 of 43
A characteristic which will show up in the offspring even if only one of the alleles is inherited.
Dominant
14 of 43
Removal of undigested food from the body in faeces.
Egestion
15 of 43
Glands which produce and secrete hormones into the blood.
Endocrine Glands
16 of 43
A protein molecule whihc acts as a biological catalyst, speeding up reactions without being affected.
Enzyme
17 of 43
When fertiliser leaks into a river and causes other organisms to die.
Eutrophication
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Anaerobic respiration in yeast.
Fermentation
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Haploid sex cells containing one set of chromosomes.
Gametes
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Genetic makeup of an organism concerning the alleles of a particular gene.
Genotype
21 of 43
Carbohydrate energy store in liver and muscles of animals.
Glycogen
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Only one set of chromosomes in the nucleus of the cell.
Haploid
23 of 43
When the two alleles for a particular gene on a pair of chromosomes are different.
Heterozygous
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The two alleles for a particular gene on a pair of chromosomes are the same.
Homozygous
25 of 43
Chemical messages which are secreted by endocrine glands and carried around the body.
Hormones
26 of 43
The part of the brain which regulates body functions and controls production of many hormones.
Hypothalamus
27 of 43
Animals without backbones.
Invertebrates
28 of 43
A process of cell division reducing the numer of chromosomes from the diploid parent cell to the haploid daughter cell.
Meiosis
29 of 43
Asexual cell division resulting in identical daughter cells.
Mitosis
30 of 43
The basic unit of the nervous system, carrying minute electrical impulses around the body.
Neurone
31 of 43
Control and regulation of the levels of mineral ions and water in cytoplasm or blood.
Oxmoregulation
32 of 43
Movement of water down a concentration gradient through a partially permeable membrane.
Osmosis
33 of 43
Physical characteristics of an organism with respect to one of more genes.
Phenotype
34 of 43
The response of a plant through growth to light shining.
Phototropisms
35 of 43
The extra circles of DNA containing extra genes found in bacteria and used in genetic engineering.
Plasmids
36 of 43
A characteristic which shows up in the offspring only when both of the alleles are inherited.
Recessive
37 of 43
DNA which has had a section of DNA from another organism inserted into it.
Recombinant DNA
38 of 43
The gap between two neurones where the transmission of the impulse is chemical rather that electical.
Synapse
39 of 43
An organism which contains DNA from another organism.
Transgenic
40 of 43
The loss of water vapour from plant leaves.
Transpiration
41 of 43
The transport tissue in plants which carries water and mineral ions up from the root through the stems to the leaves.
Xylem
42 of 43
The new diploid individual fromed when fertilisation occurs.
Zygote
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Other cards in this set

Card 2

Front

The hormone which controls the selective reabsorbtion of water in the kidney.

Back

ADH

Card 3

Front

A version of a particular gene.

Back

Preview of the front of card 3

Card 4

Front

Plant hormones involved in controlling the phototropisms.

Back

Preview of the front of card 4

Card 5

Front

Green pigment in chloroplasts capturing light energy.

Back

Preview of the front of card 5
View more cards

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