EasyBiologyHigh School (11–12)Diversity of Living Organisms › Classification of Living OrganismsDiversity of Living Organisms › AlgaeNumerical
Kavita scores two plants on 25 characters and codes each as 1 (present) or 0 (absent).
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Kavita scores two plants on characters and codes each as (present) or (absent).
Plant X: 1101101110011010110101101
Plant Y: 1101001110111010010101111
- In how many characters are they alike?
- What is their similarity, in per cent?
Need a reminder? The key ideaShow
Artificial systems used a few superficial characters, such as the number of stamens (Linnaeus), and gave vegetative and sexual characters equal weight. Natural systems (Bentham and Hooker) used many external and internal features. Phylogenetic systems follow evolution. Numerical taxonomy scores all characters with equal weight; cytotaxonomy uses chromosomes; chemotaxonomy uses chemicals.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Count. The codes differ in positions, so characters are alike.
Step 2. Per cent. .
Answer: characters alike, a similarity of .
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