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2d) Do any of the traits qualify as an autapomorphy? If so, which one(s)? 2e) Pl

ID: 259156 • Letter: 2

Question

2d) Do any of the traits qualify as an autapomorphy? If so, which one(s)?

2e) Plants that produce seeds are called (I’m not kidding) seed plants. In your phylogeny, which taxon is the sister group to the seed plants?

2f) Assume that hornworts also produced seeds. Would you consider their possession of such a trait to represent a homology or homoplasy? Defend your answer in a sentence or two.

Characters Taxon vascularstomata true leaves seeds g gametangia flowers protectedtrue embryos rootssporophyte tissue absent present green absent absent absent absent absent absent present present present present present presen present present |absent absent present absent present present present absent present absent present absent absent absent absent absent absent absent absentabsent stonewort liverwort longleaf pinepresent present present alpine fern stone moss present present present present present present resent absent present hornwort showy orchid present present present absent present absent present absent absent present present present presen present present

Explanation / Answer

Answer 2d) showy orchid show the autapomorphy as it only show the flower trait

Answer 2e) plant that produce seeds are known as phenerogams. Showy orchid is the sister group to seed plants.

Answer 2f) it is a case of homoplasy as the trait are evolved is not derived from ancestors

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