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Exercise Quizzes
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1Define tropism.



2In today's lab, which two types of trophism will you study?



3Plant growth and development are controlled by internal chemical signals called ________.
A)growth stimuli
B)tropisms
C)messengers
D)growth regulators



4How is phototropism measured in this lab exercise?
A)curvature of shoots
B)height of plants
C)enlargement of leaves
D)elongation of roots



5Roots exhibit ________ gravitropism and stems exhibit _______ gravitropism.



6In the seed germination experiment, dormancy is broken by light absorption by ________.
A)photosome
B)photochrome
C)phytochrome
D)polychrome



7All plants need light to germinate.
A)True
B)False



8________ occurs when seedlings do not receive light and the plant appears pale and their stems elongate.



9List three macronutrients of plants.



10List three micronutrients of plants.



11Plants need all the macronutrients and micronutrients to grow.
A)True
B)False



12Commercial fertilizers contain which three primary nutrients?



13Auxin promotes apical dominance.
A)True
B)False



14In today’s lab you will study plants with symptoms of ________ deficiency.



15What are the dependent and independent variables in the gibberellic acid experiment?







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