The Student Room Group

Simple homework=rep ;)

I'll rep anyone who can help me out with my brother's science homework - before anyone says anything I'm aware it's probably ridiculously easy and I should be able to do it having managed the GCSE with relative ease, but the answers just slip away from me...:redface:

Scientists at the University of Leeds have found a way to modify the genes of flowering plants. They claim that flowers from modified plants remain fresh in a vase of water for up to six months longer than flowers from unmodified plants.

Plan an investigation you could carry out in the school laboratory to test the claim that flowers from modified plants last for much longer than flowers from unmodified plants.

You will be provided with flowers from modified plants and from unmodified plants.

In your plan give: the ONE factor you will change as you carry out your investigation (this is the independent variable); the factor you will measure (this is the dependent variable); ONE of the factors you should control to ensure a fair test; the time scale of the investigation


thank you :smile:
Reply 1
Independent variable: whether it is modified
Dependent variable: time it takes before all the petals fall off or whatever
Factors you'll keep the same: Amount of water given to each plant, type of plant, amount of light, warmth

Edit: Oh and timescale. I think this may be about 6-7 months seeing as most die in about a month and the modified ones claim to only die 6 month later. This could be shortened though if the modified ones don't actually work, or lengthened if they live for longer.
zhang
Independent variable: whether it is modified
Dependent variable: time it takes before all the petals fall off or whatever
Factors you'll keep the same: Amount of water given to each plant, type of plant, amount of light, warmth

Edit: Oh and timescale. I think this may be about 6-7 months seeing as most die in about a month and the modified ones claim to only die 6 month later. This could be shortened though if the modified ones don't actually work, or lengthened if they live for longer.
*reps* thank yooou :smile: