Saturday, 23 February 2013

4.3 explain how quadrats can be used to sample the distribution of organisms in their habitats.

A sample square is taken at random. The number of a population in that square is taken. This is repeated in different areas and compared to show where populations are dense and not.

4 comments:

  1. About quadrats:

    quadrats should be placed randomly so that a representative sample is taken
    you should look at the results from several quadrats in an area to reduce the effect of an unusual distribution
    the results are more reliable when you look at the results from many quadrats
    quadrats may also be used for slow moving animals such as snails/slugs

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  2. The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  3. More at

    http://igcse-biology-notes.blogspot.hk/2017/06/43-explain-how-quadrants-can-be-used-to.html

    ReplyDelete