The structure of a double-stranded DNA as determined by Watson and Crick. Introduction: Nucleotides are ubiquitous molecules and building blocks of the nucleic acids. They consist of three subunits of molecules such as a nitrogenous base, a ribose or deoxyribose sugar, and at least one phosphate group. The nitrogenous bases of the nucleotides consist of a purine or pyrimidine base that is linked to the ribose. Deoxyribonucleic acid (DNA) is made up of deoxynucleotides, whereas the ribonucleic acid (RNA) is made up of ribonucleotides.

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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…

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Question

Chapter 12.2, Problem 2C

Summary Introduction

To determine: The structure of a double-stranded DNA as determined by Watson and Crick.

Introduction: Nucleotides are ubiquitous molecules and building blocks of the nucleic acids. They consist of three subunits of molecules such as a nitrogenous base, a ribose or deoxyribose sugar, and at least one phosphate group. The nitrogenous bases of the nucleotides consist of a purine or pyrimidine base that is linked to the ribose. Deoxyribonucleic acid (DNA) is made up of deoxynucleotides, whereas the ribonucleic acid (RNA) is made up of ribonucleotides.

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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…

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