Blcr - myPNW Take Test: Midterm 2-c × e Chegg Study | Guided Solut + ? ??? ? htt

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Blcr - myPNW Take Test: Midterm 2-c × e Chegg Study | Guided Solut + ? ??? ? https://mycourses.purdue ake/launchjsp?course assessment id-_287303_1&ccourse; id-350592 18content QUESTION 7 5 points Save Answer You are helping a fellow student build a matrix for morphological analysis of carnivorans. They construct the following pair of characters as part of their data set: Long ears 0 - absent 1 - present Short ears 0 absent 1 - present Are these good characters or do they need modifications? Why or why not. T TT ? Paragraph Arial ? "d. Mashups ? T “ ?l@&? ????? ??|? HTHL CSS Path: p Words:0 QUESTION 8 15 points Save Answer Click Save and Submit to save and submit. Click Save All Answers to save all answers Save and Submit 10:56 AM Type here to search

Explanation / Answer

These are not good character to choose. In the construction of a tree the plesiomorphic trait is the one that the outgroup presents and we code that with 0. Then, an apomorphy is when a 0 turns to 1 (alternative state).

In this case they are assigning 0 (the plesiomorphic state) to both characters (short and long ears). That is not useful for the construction of a tree.

They need to be modified, for example, lets say long ears is the plesiomorphic state. (0) and the alternative state is short ears (1).

Hope it helps! Good luck!

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