7324826
Description
Flashcards by Alice Storr, updated more than 1 year ago
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Created by Alice Storr
over 7 years ago
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| Question | Answer |
| Abiotic | Non-living factors that influence an ecosystem |
| Autotroph | Energy from the environment used to make their own food |
| Biome | An ecosystem for a certain group of organisms |
| Biosphere | Part of Earth inhabited by organisms |
| Biotic | Living factors which influence an ecosystem |
| Chemotroph | Energy comes from inorganic chemicals |
| Community | Populations sharing an area |
| Consumer | Heterotrophs, surive by eating producers and other organisms |
| Ecology | Relations of organisms to each other and their environment |
| Ecosystem | Biological community of interacting organisms and their physical environment |
| Evolution | Organism adapting to changes in the environment through genetic mutations and passing on succesful traits (survival of the fittest) |
| Food Chain | A sequence of organisms showing energy transfer between organisms |
| Food web | Representation of interconnected food chains |
| Habitat | Natural home of organisms |
| Heterotroph | Energy from organic sources - eats other organisms for energy |
| Microhabitat | A unique part of a habitat |
| Niche | A unique adaption of an organism allowing it to exploit its environment |
| Photosynthesis | Process of plants changing CO2 to O2 and H2O to C6H12O6 involving the light independent and dependent reactions |
| Phototroph | Energy from converting light energy into food |
| Population | Group of organisms in a particular place |
| Producer | First part of a food chain (1st trophic level). Gets energy from sunlight/environment (autotroph) and is predated by consumers |
| Speciation | Formation of new species - allopatric or sympatric causes |
| Species | A group of interbreeding organisms who produce fertile off-spring |
| Succession | Process of organisms developing in an area of land. Starts with pioneering species. Reaches climax communoty. Has a dominant or co-dominant species. Can be deflected with human intervention. |
| Trophic Pyramids | Graphical representation showing biomass at each trophic level in an ecosystem |
| Topography | Shape of the land - abiotic factor. Includes steepness of a slope, aspect and drainage |
| Colonisation (succession) | The pioneer species begin life in areas which are too harsh for more complex life forms. Break up surface, add nutrients and DOM which increases water-holding capacity of soil. |
| Climax community | Stable stage of succession. No reason to change unless environment changes. |
| Primary succession | On areas of land which have not previously hosted life |
| Secondary succession | Life begins on areas of land which previously hosted life but were cleared (eg. following a forest fire) |
| Deflected succession | The natural process of succession is altered by human activiity, preventing succession taking place (eg. sheep grazing on grass stop soil being approproate for more complex organisms) |
| Chloroplast (and what it contains /8) | The centre of photosynthesis. Contains: thylakoid membrane, thylakoid space, starch grain, DNA loop, outer membrane, inner membrane, granum, stroma |
| Photosystem | Clusters of photosynthetic pigments in the thylakoid membranes. Several hundred of these pigments surrounding a primary chorophyll molecule |
| Electron transport chain | Consists of several electron carrier molecules and is formed in the light-dependent reactions of photosynthesis |
| Photophosphorylation | The synthesis of ATP from ADP+P |
| ATPase | Catalyses the breakdown of ATP to ADP |
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