natural selection and genetic modification Flashcards
what is genetic engineering
modifying an organisms genome to introduce desirable characteristics
give one substance that bacteria have been genetically modified to produce
insulin
how can genetically engineered animals be used in medicine
useful proteins can be transferred into animals (e.g. sheep and cows)
proteins can be extracted from animals milk and used to treat patients
give one ethical concern with using animals in medicine
genetically modified animals suffer with health issues later in life as genetically modified embryos don’t survive
suggest 2 characteristics that a cattle farmer might want to develop in her cows over time
increase size of cattle
increase amount of milk produced
what is inbreeding
closely related organisms bred together
what does classification mean in biology
organisation of living organisms into groups
name the five kingdoms traditionally used in classification
animals
plants
fungi
prokaryotes
protists
what does the complexity of a stone tool suggest about its age
simpler stone to is, older it’s likely to be
T or F the movement of rock layers can affect the accuracy of dating stone tools
true
which scientist organised to expedition that found the 1.6 million year old homo erected skeleton
richard leakey
T or F turkana boy is older than the skeleton of arid
false
give two selection pressures that could affect an individual’s chance of survival
predation
competition for resources
disease
MRSA is a bacterium that is resistant to antibiotics. what does this mean
the bacteria cannot be killed by the antibiotics
why can bacteria evolve rapidly
reproduces at a fast rate
