Question

A bird-watcher sees a small yellow bird in a tree. Explain to the bird-watcher how he can use a dichotomous key to identify the bird. Assume he does not know anything about dichotomous keys. Then, write two steps of a dichotomous key that would be helpful for the bird-watcher.(2 points)








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Answer 1

no

Answer 2

A dichotomous key is a tool used to identify an organism based on a series of choices between two characteristics. In this case, the bird-watcher can use a dichotomous key by looking at the key's options and choosing the characteristic that best matches the bird he is observing. By following the key's steps and making choices based on the bird's characteristics, the bird-watcher can ultimately identify the species of bird they are looking at.

Step 1: Does the bird have a crest on its head?
- Yes: Go to step 2
- No: Continue to next step

Step 2: Does the bird have a black mask around its eyes?
- Yes: The bird is most likely a Yellow Warbler
- No: The bird is most likely a Goldfinch

Answer 3

I apologize for the confusion in my previous response. Here are two correct steps of a dichotomous key for the bird-watcher to use in identifying the small yellow bird:

Step 1: Does the bird have a black beak?
- Yes: Go to step 2
- No: The bird is most likely a Yellow Warbler

Step 2: Does the bird have black wings with white patches?
- Yes: The bird is most likely an American Goldfinch
- No: The bird is most likely a Yellow-rumped Warbler

By following these steps and making choices based on the bird's characteristics, the bird-watcher can use the dichotomous key to identify the small yellow bird they observed in the tree.