1 SEM CARDLESS ACC W/RAVEN TEXT
1 SEM CARDLESS ACC W/RAVEN TEXT
12th Edition
ISBN: 9781265321062
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 38.4, Problem 2LO
Summary Introduction

To describe: The gene-for-gene hypothesis.

Introduction: Plants are attacked by many factors, such as bacteria, fungi, animals, protists, and so on. Several defence mechanisms occur in plants, which block or decrease the infection. The first line of defense is thick cell walls that are covered with a resilient cuticle. The second line of defense is chemicals secreted by plants that does not cause any harm to their closely related species.

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Imagine you are a botanist.  Below are characteristics of a never-before described plant species recently identified as part of the ‘All Taxa Biodiversity Inventory’ (ATBI).   Field Notes:  Specimen collected from shaded area along stream in South Cumberland State Park                 (Grundy County, TN). Laboratory Analysis:  Body:  Large leaves emerging from underground rhizome. Size: 63 cm  Chromosomal Analysis: Plant body is diploid—chromosome number of 44. Lignin test: Positive Cuticle: Present Leaves:  Present—large with branched veins. Underside has sori (containing haploid spores). Roots: Present—branch from the inside. Stem: Present—vascular tissue (xylem & phloem) present. Life History:  Diploid sporophyte dominant generation.  Haploid spores germinate into heart-shaped, haploid, gametophyte.  Water required for fertilization; no seed is produced.  Diploid zygote develops into sporophyte. Explain which domain, kingdom and phylum you believe this plant should be classified…
CUÁ Glycine A C C Newly formed molecule Glycine Arginine Proline Alanine A C C CC G GGAUUGGUGGGGC Structure X I mRNA
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