Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 19, Problem 2PDT
Summary Introduction
To review: The factors responsible for differences among different taxa in the number of extant species.
Introduction: Extant species refers to the group of species still existing in the present era. Studying diversity with the help of fossil records may help to study the differences among extant species. The rate of origination,
Summary Introduction
To predict: The methods to determine factors responsible for differences among different taxa in the number of extant species.
Introduction: Studying diversity with the help of fossil records may help to study the differences among extant species. Extant species refers to the group of species still existing in the present era. The rate of origination, speciation, and extinction also has a significant impact on the number of extant species.
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- In a phylogenetic tree, Species 1 and 2 are distantly related to one another but are both darkly pigmented. Species 3 which is unpigmented is a sister taxon to Species 2. The common ancestor to all three species is darkly pigmented; thus, this trait in the phylogeny is considered to be a - A. homoplasy. B. synapomorphy. C. apomorphy. D. symplesiomorphy.arrow_forwardn which situation would it make sense to use the morphological species concept? When you are able to collect data about how individuals in your study use their habitat, but you are unable to determine if they interbreed When working with fossils from extinct organisms When you only have genetic data about each organism in your study When you are not able to collect data about how individuals in your study use their habitat, but you are able to collect reproductive dataarrow_forwardClosely related species are grouped together into (singular, ). By the way, what is the singular of “species”?arrow_forward
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