6. Bibliography

Biology of Plants, 6th ed. Raven, Peter H., Everert, Ray F., Eichhorn, Susan E. Worth Publishing (1999) Retrieved on 9 July, 2013, from

Creating Root-View Boxes. (n.d.). National Gardening Association. Retreived on 9 July 2013, from www.kidsgardening.com/growingideas/projects/july04/pg1.html#box

Charlotte Gerber. (n.d.). Love to know Garden. Retrieved on 30 August 2013, from http://garden.lovetoknow.com/wiki/How_Do_Plants_Grow

How do roots grow when direction of gravity changes? (n.d) Retreived July 10 2013, from http://www.indiastudychannel.com/projects/250-How-Do-Roots-Grow-When-Direction-Gravity-Changes.aspx

Investigating Plant Tropisms. (n.d.). National Gardening Association. Retrieved on 9 July 2013, from www.kidsgardening.com/growingideas/projects/july04/pg2.html

Johnson, G. B. (1999). Tropism. World Book Encyclopedia (p. N/A). Chicago, Illinois: World
Book. Retrieved on 9 July 2013

Kiss, J. (n.d.). Up, down, and all around: How plants sense and respond to environmental stimuli. Retrieved on 9 July 2013

National Center for Biotechnology Information (2006). Retrieved on 9 July 2013, from
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1348016/                          

National Gardening Association Response to Light (1999), Retrieved 9 July 2013, from http://assoc.garden.org/courseweb/course1/week2/page14.htm
 
National Gardening Association Response to Gravity (1999), Retrieved 9 July 2013, from

National Aeronautics and Space Administration (NASA), Aerospace Education Services Project (n.d). Retreived on 9 July 2013, from http://www.nasa.gov/pdf/562190main_LS4_Gravitropism_C4.pdf

Sengbusch, P. V. (2003). Botany online: Growth Movements - Geotropism or
Gravitropism. Fachbereich Biologie - UNI HH. Retrieved on 9 July 2013, from
 
Shawn, C. (2001). Geotropism, One Last Time: Scientific American. Science News,
Articles and Information | Scientific American. Retrieved on 9 July 2013, from
http://www.scientificamerican.com/article.cfm?id=geotropism-one-last-time


University of Hamburg, Faculty of Mathematics, Computer Science and Natural Sciences (1996-2004). Retrieved on 9 July 2013, from http://www.biologie.uni-hamburg.de/b-online/e32/32c.htm


University of Colorado (2004-2008) How does Gravity Affect Root Growth? Retrieved 29 August 2013, from http://www.bioedonline.org/lessons-and-more/lessons-by-topic/plants-form-function/how-does-gravity-affect-root-growth/

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