The events that occur during gastrulation, and also determine the location of three germ layers. Concept introduction: Gastrulation is an early phase in the embryonic development, during which the single-layered blastula is recognized into a multilayered structure known as the gastrula. Gastrula is known as an early multicellular embryo.

Question

6. The mammalian phylogenies (labeled a and b) were produced by two different research groups. a. In which tree do phylogenetic relationships most closely align with biogeography and why? (consult the Teeling and Hedges paper) b. What are the most closely related species to Chiroptera in each tree? Might the use of convergent traits for building phylogenies explain this difference? If so, which tree is most likely to have relied on convergent traits and why? c. What are some possible reasons that the two research groups came up with different phylogenies (in general terms)? describe at least three possible reasons.

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Question

Chapter 29.3, Problem 11WDL

Summary Introduction

To determine:

The events that occur during gastrulation, and also determine the location of three germ layers.

Concept introduction:

Gastrulation is an early phase in the embryonic development, during which the single-layered blastula is recognized into a multilayered structure known as the gastrula. Gastrula is known as an early multicellular embryo.

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