Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
IB Biology
definations for the may 2008 exams ( whole bio syllibus )
| Question | Answer |
|---|---|
| Action Potential | The reversal and then restoration of the electrical potential across the plasma membrane of a nerve cell as an electrical impluse passes along it. |
| Active immunity | Immuntiy due to the produciton of antibodies by the organism itself after stimualtion by invasion with pathogens |
| Active site | The specific region of an enzyme tow hich the substrate or substrates bind |
| Autotroph | Organisms that use an external source of enegry ( light or chemical ) to synthesise organic compounds from inorganic substances |
| Carrier | an individual that has a recessive allele of a gene |
| Carrying Capacity | The max pop size that could be supported by the envirnoment |
| Cell respiration | Release of energy in the form of ATP from the comtrolled breakdown of organic compounds within a cell |
| Clone | A group of genetically identical organisms or a group of cells derived from a single parent cell |
| Codominant allels | Pairs of alleles that both affect the phenotype when present in the heterozygous state |
| Community | A group of population living and interacting wt each other in an area |
| Degenerate | Having more than one abse triplet code for one amino acid |
| Denaturation | A structural change in a protein that results in a loss ( usally permanent) of its biological properties |
| Detritivore | Organisms that feed on dead organic matter by ingesting it |
| Diffusion | The passive movement of a substance from a region of high concentration to low concentration |
| Dominant allele | An allele that has the same effect on teh phnotype when either in the homozygous or heterozygous state |
| Ecology | the study of relationships bt living organisms and the relationship bt living organisms and their envirnoment |
| Ecosystem | A community and its aboitic envirnoment |
| Enzyme | Globular protein capable of catalysing a specific chemical reaction |
| Evolution | The processs of cumulative change in the heritable characteristics of a population |
| Excretion | Removal form the body of waste products of metabolism |
| Gene | A heritable factor that controls a specific characteristic |
| Gene Mutation | A change in the sequence of bases in a gene |
| Genetic screening | Testing an individual for the presence or absence of an allele |
| Genome | the whole of the genetic info of an orgnanism |
| Genotype | the alleles possessed by an organism |
| Habitat | the envirnoment of which a species normally lives or the the location of a living organism |
| Heterotroph | organsim that obtains its energy from organic molecules that it has consumed |
| Heterozygous | having two diff alleles at a gene locus |
| Homologouse chromosomes | A pair of chromosomes with the same genes but not nescessarily the same alleles of those genes |
| Homozygous | having two identical alleles at a gene locus |
| Linkage group | all those genes on a particular chromosome |
| Locus | the specific position on a homologous chromose of a gene |
| Natural immunity | immunity due to infection |
| Organ | A group of tissues that form a single struture and which work together to carry out a function |
| Organ system | A group of organs that work together to carry out a function |
| Organic | Compounds containing carbon found in organisms (excluding hydrogencarbonates, carbonates, and oxides of carbon) |
| Osmoregulation | The control of the water balance of teh blood, tissue fluid or cytoplasm of living organism |
| Passive immunity | immunity due to the acquisition of antibodies from another organism, via the placenta or colostrum, in which active immunity has been stimualted |
| Pathogen | A organism or virus that causes a disease |
| Phenotype | The characteristics of an organism |
| Pollination | The transfer of pollen from anther to stigma |
| Polygenic inheritance | The transmission of a characteristic influenced by several genes |
| Population | A group of organism of the same species that live in the same area at the same time |
| Recessive allele | an allele that only has an effect on the phenotype when it is homozygous state |
| Recombination | The reassortments of alleles into different combinations from those in the parents |
| Saprotroph | Organism that feed on dead organic matter by secreting disgestive enzymes onto it and absorbing the products of digestion |
| Species | A group of ogranisms that can interbreed to rpoduce fertile offsprings |
| Test cross | Testing aphenotyically dominant phenotype to determine if it is heterozygous or homozygous |
| Tissue | A group of similar cells ogranized into a functional unit |
| Transpiration | The loss of water vapour from the leaves and stems of a plant |
| Trophic level | The position of an organism in a food chain |
| gross production, | The total amount of organic matter made by producers in an ecosystem |
| Net production | Gross production minus the amount used by the producers for respiration |
| biomass | The total amount of dry organic matter in an ecosystem |
| competition | When two or more species compete for a particular resource |
| Herbivory | A primary consumer feeding on a plant or its products |
| Predation | A predator killing its prey |
| Mutualism | A realtionship bt 2 diff speices where both species have some degree of physiological dependency on 1 another and benefit fr the relationship |
| Parasitism | A relationship bt 2 diff species where only 1 species benefits and teh other is usually harmed |
| Universal | Found in all organisms |
| Resting potential | the electrical potential across the plasma membrane of a nerve cell that is not conducting an impluse |
| Osmosis | The passive movement of water molecules across a partially permeable membrane froma region of lower solute concentration to a region of higher solute concentration |
| Organelle | A discrete struture within a cell that carries out a specific function |
| Allele | A specific form of a gene, occupying the same gene locus as other alleles of that gene, but differing from other alleles by samll differences in its base sequence |
| Artifical immunity | immuntiy due to inoculation with vaccine |
| * | (blank) |
| * | (blank) |
| * | (blank) |
| * | (blank) |
| * | (blank) |
Created by:
lucy_b
Popular Biology sets