Dichotomous Key
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2 responses to “Dichotomous Key”
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Hi Lissa –
A couple of things on your couplets: Each couplet has two branches (A, B, C – you got that part right) , and both branches get labeled. Usually the first branch is labeled with the couplet name (A, B, and C), and the second branch has a distinguisher – an apostrophe is used in this class. So the second branch of each of your couplets is A’, B’, and C’. That way, if you need to point to a specific branch in a couplet, you easily can. Takes the guesswork out for the reader.
Second: on Couplet A: Plant 4 is a tree – often a short, shrubby tree, I grant you, but a tree nonetheless. Plant 1 DOES have one extremely obvious feature that distinguishes it from the others and is much simpler to use. What does Plant 1 obviously have that those other plants don’t?
Your B branch of the B couplet is good, but your B’ branch is describing two characteristics (one of which we now know is inaccurate). It’s best to keep the descriptions to one characteristic – and you absolutely got it.
Your C couplet works. Saying “Lacks white petals” would have been preferred, and saying “Has purple petals” is even better, but you may not have realized that was an option. It’s all good.
If you want, you have the option to go back and make corrections – just be aware, you may lose the indenting. WordPress is being persnickety that way.
Great job!
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Hi Lissa,
I thought your key worked great! Got me to the answers. It looked a lot like mine, but a little different, which seems to be true for everyone. Starting with no petals first was a good idea. I had a weird time with this assignment, not really inherently getting the way it was supposed to look based on the resources because the resources were so detailed and more in depth than our simple, but I’m glad we could look at other students and I’m glad we had opportunity to revise.
Good work imo,
Lowrie
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