Biology- B6 Part E

Created by: 13clarken
Created on: 06-06-18 12:39

... variations arise because of genetic variations from mutations. Over time, the ... of organisms can change so much that a new species is formed -> Happens when the same species can't interbreed to produce fertile offspring

Phenotype

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... is when a species doesn't exist anymore. Reasons include: 1) Environment changes too quickly 2) New predator kills them 3) New disease kills them 4) Can't compete with another species for food 5) Catastrophic event kills them e.g. a volcano

Extinction

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People didnt agree with ... because : -He went against common religious beliefs -He couldn't explain his findings -Not enough evidence to convince scientists

Darwin

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... said that changes in an organism in it's lifetime will be passed on to the offspring. His hypothesis was rejected because his experiments didn't support his hypothesis. Darwins hypothesis was accepted because of the discovery of genetics

Jean Baptiste Lamarck

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... is when humans artificially select the plants or animals that are going to breed, keeping certain genes within the population. They are ... bred for a purpose: e.g. -animals produce more milk or meat, Crops with disease resistance

Selective Breeding

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Process for ... : 1) Select stock that has characteristics you want 2) Breed them with each other 3) Select best offspring, and breed them together 4) Continue process over several generations, and all the offspring will have characteristics

Selective Breeding

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... transfers gene from one organism to another: 1) Useful gene cut from organism and inserted into vector 2) Vector is a virus or plasmid depending on organism 3) Useful gene inserted into cells when vector meets organisms

Genetic Engineering

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Plants can be ... by tissue culture or cuttings

cloned

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Cloning: Some plant cells are to grow with hormones and grow into new plants -> clones of parent plant. This is good because it can happen very quickly in small areas all year round

Tissue Culture

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Cloning: Gardeners take ... and grow clones of parents. The plants are produced quickly and cheaply. This is an older and simpler method

Cuttings

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Cloning: Sperm cell and egg cell taken from animals, sperm artificially fertilisers egg. Embryo develops and splits to form a clone

Animal Clones

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Other cards in this set

Card 2

Front

Back

Extinction

Card 3

Front

People didnt agree with ... because : -He went against common religious beliefs -He couldn't explain his findings -Not enough evidence to convince scientists