In the speciation model known as "punctuated equilibrium": a. Most new species of the "tree of life" are dead ends (lead to extinction) b. The majority of all new species evolve in the tropics C. New species evolve gradualy and are similar in appearance to parent species d. New species are different in appearance from parent species e. New species evolve rapidly as they diverge from parent species

In the speciation model known as "punctuated equilibrium": a. Most new species of the "tree of life" are dead ends (lead to extinction) b. The majority of all new species evolve in the tropics C. New species evolve gradualy and are similar in appearance to parent species d. New species are different in appearance from parent species e. New species evolve rapidly as they diverge from parent species

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter12: Diversity Of Life

Section: Chapter Questions

Problem 11RQ: Which assumption of cladistics is stated incorrectly? a. Living things are related by descent from a...

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According to the punctuated equilibrium model, (a) populations slowly diverge from one another (b) the evolution of species occurs in spurts interspersed with long periods of stasis (c) evolutionary novelties originate from preadaptations (d) reproductive isolating mechanisms restrict gene flow between species (e) the fossil record, being incomplete, does not accurately reflect evolution as it actually occurred
According to the punctuated equilibria model,(A) given enough time, most existing species will branchgradually into new species.(B) most new species accumulate their unique features relatively rapidly as they come into existence, then changelittle for the rest of their duration as a species.(C) most evolution occurs in sympatric populations.(D) speciation is usually due to a single mutation.
How does one species diverge from another? (When do we call a group a new species—and how does that process happen?) Using anole lizards or another very specific example(s), compare and contrast microevolutionary processes with speciation. As you discuss speciation, be sure to compare and contrast sympatric speciation with allopatric speciation and say whether the example you’ve chosen is allopatric or sympatric.
The average speciation rate minus the average extinction rate is which of the following? a. Mode of evolution b. Net diversification rate c. Tempo of evolution d. Speciation with gene flow
Suppose the phylogenetic species concept (PSC) were preferred over other species concepts, such as the BSC. What would be the implications for (a) discourse on the evolutionary mechanisms of speciation; (b) studies of species diversity in ecological communities; (c) estimates of species diversity on a worldwide basis; and (d) conservation practices under such legal frameworks as the U.S. Endangered Species Act?
Which of the following would result in allopatric speciation by dispersal? A. A river separating a previously contiguous population of salamanders B. A receding water table separating a population of frogs into two separate wetlands C. Finches colonizing an island exposed by water level changes in a reservoir D. A population of trees being split in two by an advancing glacier
Place the following events in the order in which they are most likely to occur by numbering them from 1 to 5. a. Speciation occurs. b. Genetic divergence takes place. c. Geographic barrier arises. d. Gene ﬂow is discontinued. e. Species adapts to a new environment.
A defining characteristic of allopatric speciation is Group of answer choices A. Geographic isolation. B. Aasexually reproducing populations. C. Occurance of natural selection. D. The appearance of new species within the distribution range of the parental species.
Which of the following is a good description of Sympatric speciation? A. Speciation without geographic isolation B. Changes in sequence of DNA of an organism C. Speciation due to geographical isolation D. The change in the genetic characteristics of a population of organisms over time
Consider this example. Shorebirds on the Eastern coast of North America feed on the mollusks and tiny crabs along the shore. Birds with tougher beaks are better adapted to crack open the shells of the mollusks, and birds with sharper beaks are better adapted to pierce the shells of crabs. Over time, the shorebirds become two separate species that no longer breed with one another. What type of speciation has occurred? A. Sympatric speciation B. Adaptive speciation C. Microevolution speciation D. Allopatric speciation
mountain range separates a population of gorillas. After many generations, the gorillas on different sides of the mountain range cannot produce viable, fertile offspring. What has happened? a. Sympatric speciation c. Parapatric speciation b. Allopatric speciation d. Adaptive radiation
compare and contrast between the following a) allopatric speciation and sympatric speciation. b) autopolyploid speciation and allopolyploid speciation c) natural selection and sexual selection