Biology help...?

Question

Chosse the element,Nitrogen, and describe how we could carry out an experiment to show that it is essential for the normal development of a green plant...
IN what form and by what processes are mineral elements taken up by the roots of a plant?

Answer 1

Mineral processes are taken up by the roots of a plant by the process of nitrogen fixation. Lightening causes nitrogen gas to ract with oxygen in the air to produce nitrates.(the usable form of nytrogen gas in the atompshere) NItrates dissolve in the rain or surface waters, enter the soil and then move ito plants throught their roots. The plants can then produce a variety of proteins which are then consumed by animals then deposited back into the soil and then the atomosphere etc. An alternate pathway for the production of nitrates is through nitrogen fixing bacteria. The bacteria grows on teh roots of legumes such as clover or alfalfa. They convert atmospheric nitrogen to nitrates. The bacteria provide these plants with a built in supply of nitrogen, while the plant provides the nitrogen-fixing bacteria with needed sugars.

The only way I can think of an experiment is to take some living grass from an older lawn with less nitrogen and grow some clover on it since it is rich with nitrogen it will flourish, and another to take an nitrogen green lawn that is fairly new and try and grow some clover on it and it will not take because the grass is already very enriched with nitrogen.

Answer 2

nitrogen is the major element required t o plants.
First it is taken up and converted in to ammonia,nitrates and nitrites respectively by different bacteria which are present both in soil and roots.
Then it can be circulated all over the plant by osmosis.
this process is knowwn as nitrogen fixation.
it is crossed in second year microbiology.

Answer 3

transplant it into Nitrogen free soil and watch it turn yellow then brown and die.

The other, referring to element take up is by osmosis

Answer 4

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