Got given a practice prac on plant hormones.
1. Place 8 corn seeds (with 2 each facing towards the 4 poles, so North, East, South, West).
2. Cover seeds with a piece of filter paper
3. Pack petri dish with moist cotton wool.
4. Put lid on the petri dish and seal it with sticky tape.
5. Stand petri dish upright attached on plasticine and near a window.
6. Let it stand for 1 week and observe.
Q1 )The question asked if the above was a controlled experiment or not.
I think that it was not a controlled experiment as there weren't any variables subject to any change. (Not too sure about this question). However, maybe the north and south placed seeds could be the controls to show the direction of growth of shoots?
Q2) What differences in growth were visible over the period of the investigation? And suggest any reasons for any differences of growth and explain how it could be altered.
The shoots all grew vertical, while the roots will grow down.
Need help on writing an aim and hypothesis!
Like on the petri dish , imagine there are 4 points, N E S W. And in each of those directions we put 2 seeds in there. Btw, do you hhave any IM ?
The petri dish is just upright and left alone for 1 week. The aim is most likely to observe the growth reponse from seeds to light and gravity ? Got skype or something?
Well just imagine it will be like
and in each of the poles, there are 2 seeds in them
OK, so the West, East, North and South are only for confusion...
Yep, in such case you're researching the effect of gravity. And yes, auxin flux is responsible for that.
Cis or trans? That's what matters.
could you suggest me a possible hypothesis?
Suggest a biomolecular reason for any diffrences observed in the growth of plant and explain how the growth was alterted.
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