B1 b
- Created by: anniedarlington
- Created on: 27-03-15 15:59
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- B1b
- adaptations
- cactus = thick fleshy stem to store water
- competition and environmentalchange
- two species wanting same resource = have to compete
- species may depend on each other as a source of food
- air pollution can affect the distribution of a species
- Untitled
- pyramids of biomass
- energy initially comes from the sun
- used to show problem of DDT as DDT is stored in tissues and pyramid of bioass shows mass of living tissues
- cloning
- tissue culture = a few plant cells are put into a growth medium with hormones and they grow into new plants
- free and quick, plants can be made in little space
- issues = reduced gene pool, ideal offspring, risk of disability, can help preserve endangered species, clones not healthy
- tissue culture = a few plant cells are put into a growth medium with hormones and they grow into new plants
- genetic engineering
- herbicide tolerant = fewer weeds to compete with crops - higher yield, cheaper better quality food for customers
- reduce biodiversity, might not be safe to eat, transplanted genes might spread
- scientist may come up with different ideas for the same evidence because of their beliefs and because of their influences
- adaptations
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