Chapter 16: Self-Quiz Your arm is homologous with a seal flipper an octopus tentacle a bird wing a sea star arm both a and c All organisms share the same genetic code. This commonality is evidence that Evolution is occurring now. Convergent evolution has occurred. Evolution occurs gradually. All organisms are descended from a common ancestor. Life began a long time ago. Which of the following are fossils? pollen grains buried in the bottom of a peat bog the petrified cast of a clam's burrow the impression a clamshell made in mud, preserved in mudstone an insect leg sealed in plant resin all of the above In Africa, there is a species of bird called the Yellow-throated Longclaw. It looks almost exactly like the meadowlark found in North America, but they are not closely related. This is an example of uniformitarianism coevolution gradualism vestigial structures convergent evolution Which of the following are examples of vestigial structures? your tailbone nipples on male mammals sixth fingers found in some humans your kneecap none of the above Which of the following would stop evolution by natural selection from occurring? if humans became extinct because of a disease epidemic if a thermonuclear war killed most living organisms and changed the environment drastically if ozone depletion led to increased ultraviolet radiation, which caused many new mutations if genetic recombination, sexual reproduction, and mutation stopped, so that all offspring of all organisms were exact copies of their parents all of the above A species is defined as a group of organisms that is very similar in structure and habitat preference that lives in the same place that interbreeds that can but does not normally interbreed with others that has the same number of chromosomes The Scala Naturae (Ladder of Nature) system of categorizing organisms was the work of which philosopher? Aristotle Plato Darwin Wallace Linnaeus Structures (like molar teeth in vampire bats) that are homologous to important structures in other organisms but serve no purpose in the organism being considered are analogous mutations homozygous heterozygous vestigial Fat-insulated streamlined bodies of seals and penguins are superficially similar, although these organisms are not closely related. Such superficially similar structures are vestigial structures homologous structures genetically similar developed through convergent evolution coevolved An organism's fitness refers to its physical conditioning size in relation to other members of the population reproductive success competitive ability degree of heterozygosity The theory of natural selection states that: Some live and some die in each generation. Only the largest and strongest survive. Random assortment of genes results in better characteristics in the following generations. The best-adapted individuals survive and reproduce, contributing the most genes to the next generation. Individuals that mutate in response to their environment will survive. Some of Darwin's most important discoveries were based on studies of birds captured in Tahiti Jamaica Ecuador The Bahamas The Galapagos Islands Evidence that supports the theory of evolution is found in the studies of embryos biochemistry fossils artificial selection all of these Convergent evolution occurs when: Unrelated organisms develop analogous structures. Different species evolve to become one. Populations merge into one. Analogous structures evolve to be homologous. none of these Designed in cooperation with Andrew Stull and Steven Brunasso. Last Update - July 25, 1997 © Prentice-Hall, Inc. A Simon & Schuster Company Upper Saddle River, New Jersey 07458 Legal Statement
Designed in cooperation with Andrew Stull and Steven Brunasso. Last Update - July 25, 1997
Last Update - July 25, 1997
