Question

EXERCISE 3A A TAKE-HOME EXAMPLE Complete the following exercise in building a phylogenetic tree at home before the lab period in which you'll explore Exercise 3b. Tou have the following information about four plant species. Plant X is the outgroup. Code the characters as ances tral or derived and then build a phylogeny. There may be more than one possible tree. If you have a character that occurs multiple times (in separate lincages) in the tree, indicate it with an asterisk (*). PLANT REPRODUCTIVE BODY RHIZOMES PLANT HEIGHT absent short seeds seeds TYPE OF LEAVES compound compound compound simple simple TYPE OF STEM smooth smooth hairy hairy hairy present tall seeds present all seeds present short spores present short PLANT CODED CHARACTERS B C # number of character states

Answer 1

Here X is the our group. So the character of X are taken in primitive state.

Here character states are:

*spores=0, seeds 1

*Simple leaves=0 , compound=1

*Hairy stem=0, smooth =1

*Rhizome present =0, absent=1

*Plant height short=0, tall=1

Now the data matrix is:

Plants	Reproductive body	Types of leaves	Types of stem	Rhizome	Plant height
A	1	1	1	1	0
B	1	1	1	0	1
C	1	1	0	0	1
D	1	0	0	0	0
X	0	0	0	0	0

Now look in the image for phylogenetic tree.

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