Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 18, Problem 15SQ
Summary Introduction

To match: The terms with suitable descriptions.

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This video refers to Denisovans as a “Ghost Lineage.” In fact, Denisovans don’t even have a formal scientific name. What is the physical evidence that anthropologists need to further define and understand the Denisovans?   A. None of the above   B. A Type Specimen (and more Denisovan fossils)   C. Neanderthal DNA   D. H. sapiens DNA
In 1983, a team of scientists discovered a fossilized bone of a giant bird when excavating land in Brazil. After studying the fossil, the team thought that the bird was unique to South America but had been extinct for millions of years. Many years later, another fossil from the same giant bird was found in Nigeria. The two fossils were formed in rock that was very similar to one another.   Look at the land masses on the map. What can the scientists conclude?   a The land masses were once connected. b These were two different types of giant birds, even if their fossils look identical. c The fossils date to different time periods and appear in separate regions. d The giant bird migrated to South America, because the bones were later found in Nigeria.
Why can’t scientists just do DNA analysis on these fossil hominins to determine if they are a separate species and possibly what species they belong to?    A. The DNA of fossil hominins is too similar to modern humans, making it difficult to distinguish between them.   B. The technology for extracting DNA from fossils hasn't been developed yet.   C. The fossils would need to be in a -5 degree Celsius environment to prevent DNA from degrading   D. Scientists can't perform DNA analysis on fossil hominins because the fossils have been contaminated with modern human DNA over the years, making it impossible to isolate the ancient genetic material.
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