9.1/9.2 Transport in Plants

First a generalised introduction to the concept of transport in living organisms:7.1 transport systems a7.1 transport systems b


Next a generalised idea of the concept exchange surfaces:7.2 exchanges organisms and environment a7.2 exchanges organisms and environment b


The syllabus for 9.1 – xylem, transpiration, water absorption and movement, xerophytes
new syllabus 9.1 xylem transpiration xerophytes

And all the necessary reading:

7.4 xylem a7.4 xylem b7.5 water uptake roots a7.5 water uptake roots b7.6 water move stem leaves a
7.6 water mo ves stem leaves b7.7 transpiration a7.7 transpiration bM

OBLIGATORY PRACTICAL #7 POTOMETER. The use of a potometer for measuring and comparing rates of transpiration in different environmental conditions is the one obligatory HL practical, which may be tested in Paper 3. There are available several virtual labs.
  1. This is the McGraw-Hill virtual transpiration lab, investigating the effect of different environmental conditions on the rate of transpiration of different species of plant:  http://www.mhhe.com/biosci/genbio/virtual_labs_2K8/pages/PlantTranspiration.html
  2. Another, from Pearson (The Biology Place) is a very thorough work out which includes links to labs on, or information about, water potential, osmosis, water flow in plants, stomata and guard cells, photosynthesis and several other related themes. But there do not seem to be complete, simulated results from a transpiration investigation from which to work.)  http://www.phschool.com/science/biology_place/labbench/lab9/intro.html
  3. From classzone, this is the best of the virtual labs, but needs you to patiently to go through each and every step before you can advance further:  https://www.classzone.com/books/hs/ca/sc/bio_07/virtual_labs/virtualLabs.html 

7.8 xerophytes a7.8 xerophytes b


9.2 Phloem and translocation

new syllabus 9.2 phloem7.9 phloem a7.9 phloem b7.10 translocation a7.10 translocation b

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