A plants bushiness is promoted by a ratio a high

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Question 11 of 11 4.0 Points A plant’s bushiness is promoted by a _______ ratio. A. high auxin-to-gibberellin B. low auxin-to-gibberellin C. high auxin-to-cytokinin D. low auxin-to-cytokinin E. high gibberellin-to-cytokinin Reset Selection Mark for Review What's This? Part 2 of 3 - Photoreceptors and Light Question 1 of 9 4.0 Points Young leaves that emerge from the coleoptile of a developing seedling are all rolled up, like a rolled-up newspaper. Unrolling of the leaves involves physiological changes within the leaves including cell expansion. After being exposed to light, they quickly unroll into the flat conformation that is typical of a grass leaf blade. How would you determine if leaf unrolling is a phytochrome mediated response?
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5/29/13 8:53 PM 2013 Plant Biology Lectures 8-10 Problem Set 8 Page 5 of 11 Reset Selection Mark for Review What's This? Question 2 of 9 4.0 Points How might you determine if leaf unrolling described in the previous question is mediated by gibberellin ( one of the plant hormones ) in a phytochrome dependent manner? i,e., how can you show that phytochrome activation changes the production, release, or activity of giberellins which in turn causes leaf unrolling. Pick experiment(s) that would help support this model Reset Selection Mark for Review What's This? Question 3 of 9 4.0 Points In a short-day (long-night) plant with a critical day length of 15 hours, flowering would be induced by _______ hours of light alternating with _______. Reset Selection Mark for Review What's This?
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