In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct
Only the tip of the seedling received the light
The light was not strong enough
The seedlings were rather too young
The tip of the seedling may have been covered
The box containing the seedling should have been placed on a laboratory bench
Explanation
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Discussions (32)
I don't totally agree with A. Cos if only the tip receives light, it could av easily been from any side (north-west, north-east of d plant) causing it to move sideways in its later stage buh if its tip s covered (with a cap, aluminium foil,etc), the position of light will definitely not trigger its response to light causing it to continously grow erect.
My ans: D
the answer is D and it is an observation from Charles Darwin experiment on Phototropism
Stop missing things up and pls stop confussing others go back to ur textbook,becos the ANSWER is D!
D ans s d bc0s it s an etiolatd plant..etiolation means wen a plant unabl 2 reach light dn its grw upward wit d viewng f reachng light bh d plant wil b thin nd latr die due 2 lck f productn f fud
Thank you all for your contributions. Apologies please for the mix-up. Kindly note that the necessary correction has been effected. You can peruse the explanation provided above.
A is flawlessly the answer bcos the plant would certainly grow sideways if the lite was coming frm any oda direction, due to the effect of lite on the auxin of the plant.
The correct answer is D....part of the question reads “young seedlings in a box were subjected to light from one direction”...option A reads “Only the tip of the seedling received the light”....it can't be option A because it contradicts the main structure of the Question...the whole seedling was exposed to uni-directional light not just the tip....plant growth is influenced by the distribution of Auxin..the uni-directional light causes unequal distribution of auxin with the illuminated side having less than the other side...in this case the seedling bends towards the direction of light....if the seedling still grow vertical, the tip must have been covered, here the distribution of auxin is uniform and very fast...option D also explain why forest undergrowth growing permanently in the dark grow very fast and tall....
