science Flashcards
Which organelle is responsible for releasing energy through respiration?
mitochondria
What is the function of ribosomes?
protein synthesis
Give the word equation for aerobic respiration
glucose+oxygene=carbon dioxide +water
give the word equation for photosynthesis
water + carbon dioxide =oxygene+glucose
what type of reaction of photosynthesis
endothermic
list the 4 levels of organisations for ecosystems
individual, population,
community, ecosystem
whats the difference between biotic and abiotic factor
Abiotic, non-living factors that affect an ecosystem
Biotic, living factors that affect an ecosystem
list 4 abiotic factors
temperature
light
water
pollutants
list 2 biotic factors
competition
predation
explain parasitism
A parasite takes food or shelter from the host. The host doesn’t benefit
describe mutualism
A relationship between two organisms, benefits both organisms
state what u use a quadrat for
Used to compare how common an organism is in two sample areas
State how to calculate mean number of organisms per quadrat
Mean = total number of organisms/number of quadrats
Define a belt transect
A straight line (rope or measuring tape) with quadrats placed at regular intervals
State 3 ways human interaction impacts biodiversity
Fertilisers, farming fish using open nets, introduction of non-indigenous species
2 ways to increase biodiversity
Re-forestation conservation schemes to protect at risk species
3 ways carbon dioxide is recycled back into the atmosphere
respiration, burning fossil fuels, decay process
state what decomposers do in the nitrogen cycle
decompose proteins and urea into ammonia
state what nitrogen fixing bacteria do in the nitrogen cycle
turn atmospheric nitrogen into ammonia and ammonium ions
state what denitrifying bacteria do in the nitrogen cycle
turn nitrates back into nitrogen gas
