Whether compound light microscope or an electron microscope is the best choice to observe the surface of a microscopic section of bone. Introduction: Microscope is an instrument used to observe minute organisms which are invisible to the naked eyes. The first microscope was devised by Anton von Leeuwenhoek and later several modifications were made to enhance its resolution and magnification. In the present day, state-of-the-art microscopes are available. The most commonly used microscopes are light microscope and electron microscope .

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You have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.

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Chapter 3, Problem 1CT

Summary Introduction

To determine: Whether compound light microscope or an electron microscope is the best choice to observe the surface of a microscopic section of bone.

Introduction: Microscope is an instrument used to observe minute organisms which are invisible to the naked eyes. The first microscope was devised by Anton von Leeuwenhoek and later several modifications were made to enhance its resolution and magnification. In the present day, state-of-the-art microscopes are available. The most commonly used microscopes are light microscope and electron microscope.

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You have returned to college to become a phylogeneticist. One of the first things you wish to do is determine how mammals, birds, and reptiles are related. Like any good scientist, you need to consider all available data objectively and without a preconceived “correct” answer. In pursuit of that, you should produce a phylogenetic tree based only on morphological features that show birds and mammals are more closely related. You will then produce a totally different tree, also using morphological features, that shows birds and reptiles are more closely related. Do not forget to include all three groups in both your trees. Based solely off the trees you produce, which relationship would you consider the more likely and why? Once you have answered that question, provide a brief summary of the “modern” understanding of the relationship between these three groups.

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