Concept explainers
To determine: The importance of phylogeny in deducing the novel medicines from seed plants.
Concept introduction: Phylogeny depicts the evolutionary relationship among a group of organisms. It describes how a group of organisms evolved with the time. The relationship among a group of organisms is depicted through a phylogenetic tree. The phylogeny can be deduced using either the DNA sequence or morphology.
There are various terms used in study of phylogenetic tree namely monophyletic, paraphyletic and polyphyletic. The monophyletic taxon refers to a clade that contains all the descendants of a common ancestor. A paraphyletic clade contains descendants from a common ancestor but not all the descendents. On the other hand, the polyphyletic is a clade that contains descendants from more than one common ancestor.
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BIOLOGY DUAL ENROLLMENT VERSION
- Constructing a Phylogenetic Tree Now, you are going to create and the interpret your own phylogenetic tree. Take a look at the characteristics for these organisms. Plant Group Photosynthesis? Seeds? Water-conducting Tissue? Flowers? Ferns X Gymnosperms Mosses Angiosperms Using the characteristics from the table above, determine where each of these organisms belongs on the tree below, then answer the questions. A В What characteristic appears just before group C branches off (the starred location)? flowers water conducting tissue seeds O photosynthesisarrow_forwardConstructing a Phylogenetic Tree Now, you are going to create and the interpret your own phylogenetic tree. Take a look at the characteristics for these organisms. Seeds? Plant Group Photosynthesis? Water-conducting Tissue? Flowers? Ferns X Gymnosperms Mosses X Angiosperms X Using the characteristics from the table above, determine where each of these organisms belongs on the tree below, then answer the questions. D В Which plant group belongs at position "B"? mosses gymnosperms angiosperms fernsarrow_forwardConstructing a Phylogenetic Tree Now, you are going to create and the interpret your own phylogenetic tree. Take a look at the characteristics for these organisms. Plant Group Photosynthesis? Seeds? Water-conducting Tissue? Flowers? Ferns X Gymnosperms Mosses Angiosperms X Using the characteristics from the table above, determine where each of these organisms belongs on the tree below, then answer the questions. D A В Being able to do photosynthesis is an example of a: O shared derived character O shared ancestral characterarrow_forward
- Clausen and colleagues proposed two hypotheses to explain this variation within a species: (1) There are genetic differences between populations of plants found at different elevations. (2) The species has developmental flexibility and can assume tall or short growth forms, depending on local abiotic factors. If you had seeds from yarrow plants found at low and high elevations, what experiments would you perform to test these hypotheses? Select the three experiments.arrow_forwardDRAW IT Use the letters a–d to label where on the phylogenetictree each of the following derived characters appears.(A) flowers(B) embryos(C) seeds(D) vascular tissuearrow_forwardLook at picture attached A) What does the phylogeny suggest about the evolutionary process that led to the trait differences by habitat? a. convergent evolution b. adaptive radiation c. phenotypic plasticity B) Choose different functional forms from two of the habitats shown in the collage and describe how one or more differences in form may represent an adaptation to their different environment. Example: compare plant form for lobeliads in montane bog to cloud forest understoryarrow_forward
- Now you will practice identifying the phylogenetic tree that corresponds to a given character table. The following table shows three key events in the evolution of plants: the development of vascular tissue, the development of flowers, and the development of seeds. Plant groups Vascular Tissue Flowers Seeds Gymnosperms 1 0 1 Mosses 0 0 0 Ferns 1 0 0 Angiosperms 1 1 1 Select the phylogenetic tree that correctly represents the data in the character table.arrow_forwardExplain how polyploidy in plants can generate new plant species. Be sure to provide molecular detail. What barriers to reproduction cause speciation in this case?arrow_forwardYou have access to the sequence genomes for moss and the lycophyte Selaginella. Your goal in analyzing the data is to write a ground-breaking paper that answers an important question about the evolution of plants. What questions would you try?arrow_forward
- FILL UP THE TABLE WITH 1=PRESENT AND 0=ABSENT Xylem Wood and Phloem Seeds Chloroplast Cuticle and Flower Chlamydomonas Marchantia Psilotum Gingko |xora Construct a phylogenetic tree for the following OTU and use bars to denote their apomorphiesarrow_forwardDraw a phylogenetic tree illustrating our current understanding ofplant phylogeny; label the common ancestor of plants and the originsof multicellular gametangia, vascular tissue, and seeds.arrow_forwardExplain why plants being polyploid makes using the phylogenetic species concept difficult to use. Be sure to explain how the phylogenetic species concept attempts to classify organisms into distinct species. How can scientists still use the phylogenetic species concept to classify land plants, despite the majority being polyploid? (What do they do to get around this problem?)arrow_forward
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