I'm not sure about this question, i hope you can help....
Q. (a) A researcher measured the concentrations of oxygen in the air around some cells placed in strong sunlight. He found that as time passed the oxygen concentration continued to increase. Explain this observation.
Q. (b) The researcher then changed the light intensity until it was observed that the concentrations of oxygen and carbon dioxide in the surrounding air remained constant.
(i) Explain this observation
(ii) Was the light intensity increased or reduced by comparison with the conditions in Part (a) of this question?
thanks heaps!! :-) I appreciate you takin' the time.
2006-10-01 14:12:44 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
May i just say that all of these answers were very helpful, thank you so much!! but I wish that I could pick multiple best answers hey. anyways thanks again for those who anwered my question, much appreciated!! :-)
2006-10-01 14:32:23 · update #1
(a) is explained by photosynthesis.
(b) (i) the concentration of oxygen and carbon dioxide remained constant because there is an equilibrium, what is being produced is now being consumed in equal amounts.
(ii) the light intensity was decreased relative to the conditions in part (a).
2006-10-01 14:20:32 · answer #1 · answered by The ~Muffin~ Man 6 · 1⤊ 0⤋
in a the reason of the increase in the oxygen would be the cells have photosynthesizing capabilities and are converting the suns energy into usable energy for them and giving off oxygen as a byproduct (from the z cycle and the etc if I remember correctly) the second part would be that the light intensity was greatly reduced so that the photosynthetic receptors on the cells couldn't get enough energy from the sunlight to carry out the full processes of converting sunlight into usable energy (ATP) therefore there were no byproducts such as oxygen so the levels remained the same
2006-10-01 14:21:53 · answer #2 · answered by ClevelandSportsFan 3 · 0⤊ 0⤋
It's all about photosynthesis. The light allows the cells to convert CO2 into oxygen.
For part (b), the light intensity would be reduced.
The links below should provide all the information you need on photosynthesis.
2006-10-01 14:21:54 · answer #3 · answered by Bramblyspam 7 · 0⤊ 0⤋