Biology- Ecology (biodiversity)

Descripción

GCSE (Ecology and biodiversity ) Biology Fichas sobre Biology- Ecology (biodiversity), creado por Somto Ibeme el 13/04/2018.
Somto Ibeme
Fichas por Somto Ibeme, actualizado hace más de 1 año
Somto Ibeme
Creado por Somto Ibeme hace más de 6 años
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Resumen del Recurso

Pregunta Respuesta
What affects the rate of decay? temperature (decompose quicker, increase enzyme rate) water oxygen no. of decay organism
What is compost? decompose organic matter, natural fertiliser
What is biogas? anaerobic decay of waste material, methane, burned for fuel, generate electricity
What is biodiversity variety of different species of organisms within an ecosystem
What affects biodiversity? deforestation (loss of habitat) global warming water pollution (fertiliser, eutrophication) land pollution (pesticides/herbicides) air pollution
high diversity rain forests, woodlands
low diversity deserts and polar reigons
What is food security? having enough food to feed a population
What affects food security? world population/birth rate increasing diets in developed countries change (demand for scarce food, imported) new pests/pathogens environmental conditions (drought), widespread famine high input costs (seeds, machinery, livestock) hard to maintain
How can fish populations be conserved? fishing quotas (limits on no. and size of fish that can be caught tin areas) net size/mesh (reduce no of unwanted/discarded fish (ones accidentally caught) allow them to escape
How is mycoprotein created? fungus Fusarium, aerobic conditions warm H2O out/cold H20 in, control temp steam (kill unwanted bacteria) paddles (prevent waste building up) CO2 taken, more CO2, less O2, less yield
How to create insulin from bacteria? introduced gene for human insulin grow bacteria in vat collect to treat diabetes
Advantages of single celled protein: no animal welfare issue cultured on waste materials overcomes issue with limited land space
Disadvantages of single celled protein: long process (need to purify protein, less efficient) flavour different from traditional protein
How does fishing affect biodiversity? other fish and dolphins, rays and sea turtles caught in nets, killed/injured more chance of being caught by predator struggle to provide for itself
What is agriculture used for? grow crops for food (livestock/humans) rear animals to be killed for food rear animals for food products (eggs) grow crops for fuel (biofuels)
What is monoculture? only growing one type of crop
Advantages of monoculture: save money on wages
Disadvantages of monoculture: if one pest affects one crop, whole crop field gone damage soil and remove nutrients
Advantages of crop rotation: replenish nitrogen quantity in soil, repairing
What is biotechnology? use living organisms to develop and make products genetic modification, cloning
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