A. Plant has cones – Plant 1
A’. Plant has no cones – B
B. Plant has flowers with petals – C
B’. Plant has flowers without petals – Plant 4
C. Petals are purple – Plant 3
C’. Petals are white – Plant 2
Dichotomous Key
Comments
2 responses to “Dichotomous Key”
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Hi Michael –
This is correct and resolves as it should. You will see keys organizing couplets in a couple of ways, including indenting, which makes it quite a bit easier to follow. Some keys also embed a target couplet beneath its pointing couplet (I would have gone B -> C and C’, then back down to B’).
There is one point to consider: it’s best to avoid using the term “no” in the choices, in favor of something more descriptive, e.g. A: Plant has glitter -> B, A’: Plant lacks glitter -> C. The descriptive you used – “Plant has leaves without rhinestones” – works great for that reason.
Does that make sense?
Thanks,
Steph -
Hi Michael –
I missed the second requirement of the rubric – please take a look at it, go back and fix the issue, then resubmit. It’s worth 10 points, so definitely worthwhile.
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