Definitions Flashcards
Chloroplast
Absorbs light energy used in photosynthesis to make useful organic compounds
Thylakoids
High surface area-increase the rate of photosynthesis.contains photosynthetic pigments- chlorophyll a,b and carotene
Photo ionisation
Electrons are excited which leave the chlorophyll
Calvin cycle
Uses the products from the light dependant reaction to convert co2 into useful organic compounds like lipids, glucose, amino acids
Dehydrogenation
Loss of a hydrogen atom
Decarboxylation
Loss of carbon atom
Respiratory substrate
any biological molecule that can be respire to release energy
Population
All the organisms of a single species in a habitat
Community
All the organisms of all the species In a habitat
Niche
The role of a species in an ecosystem
Trophies level
Each stage of the food chain
Respiratory loss
The energy used by organisms for respiration
Calorimeter
Used to estimate the amount of energy stored in dry biomass
Saprobiontic nutrition
Digestion or break down or organic matter by the extracellular enzymes
Saporbionts
Type of decomposed that digests their food by saprobiontic nutrition
Mycorrhizae
Fungi that grow in multanistic relationship with plant roots
Natural fertiliser
Contains nitrogen and phosphorus in organic compounds
Artificial fertilisers
Inorganic chemical compounds that contain nitrogen and phosphorus
Leaching
When soluble compounds are washed off by the rain
Tropism
The response of a plant to a directional stimulus
Taxes
Mobile organisms moves towards or away from a directional stimulus
Kinesis
Mobile organisms change their movement in response to a non directional stimulus
Reflex
A rapid response to a stimulus without conscious control
What is substrate level phosphorylation
When ATP is made without needing ATP synthase …phosphate is added to ADP from another molecule
Net primary production
The amount of chemical energy a producer stores at biomass
Intra specific competition
Competition amongst member of the same species
Inter specific competition
Utalizing a shared resource
Keystone species
A species that is critical within on habitat that if it was wiped out it would have a knock on effect
Fundamental niche
The environmental tolerances habitats and functional roles that a species has the potential to exploit and display
Realised niche
Where organisms interact with one another at various levels, the range of conditions in which a species actually lives and reproduces
Niche overlap
When organisms require an charge the same functional niche
Resource partitioning
Completion is often avoided by dividing up environmental resources such that each competitor exploits different portions of the resource
Convergent evolution
Similar body plans even though the species live in different habitats
