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Posted by OrangeCurlyDoe (U15508247) on Monday, 18th February 2013
Can anyone help me with these:
1= if we put a plant in dark, what would happen to the length of its stem?
2= if we put a plant in the shade what would happen to the width of its leaves?
Posted by U15613490 (U15613490) on Monday, 18th February 2013
answer 1- Plants left in the dark will grow taller than plants in lighted conditions over a short period of time, but they will also be yellower and more spindly (etiolation). The increased height is a response to low light levels - the plant is trying to grow over anything that may be blocking the light, and will grow towards any source of light.
Posted by The Bitesize Science Teacher (U14392404) on Monday, 18th February 2013
Question 2 has more than one answer. If the plant didn't get enough light, it might simply die and its leaves will drop off. On the other hand, plants that grow in the shade tend to have larger leaves than those that grow in bright sunshine. This can even be seen on a single plant - leaves at the bottom are often larger than those at the top.
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