Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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- Which of the following is the MOST important characteristic of a trait for it to undergo descent with modification? A. It must be heritable. B. It must exhibit variation. C. It must exhibit phenotypic plasticity. D. Variation in the trait must be accompanied by variation in fitness.arrow_forwardA population of plants raised in a sealed greenhouse has been pure breeding for red flowers for many generations. There are no other plants of this species in the greenhouse or it does not occur outside of the greenhouse. One day a blue-flowered plant is discovered in the population. Which evolutionary force is responsible for this change? Group of answer choices a. natural selection b. drift c. migration d. mutationarrow_forwardGenetic drift and natural selection can both result in rapid evolution. However, O A. natural selection requires genetic drift to provide new variation in populations. O B. genetic drift works slowly in small populations. O C, only drift leads to adaptation. O D. both processes of evolution could be slowed by gene flow.arrow_forward
- Which of the following is Not required for Natural Selection to occur with a biological population? A. Not all offspring survive to reproduce B.Individuals is the population with some phenotypic variants must have higher fitness on average C. Individuals with one phenotype must always have more offspring than individuals with other phenotypes D. The phenotypical variation within a population of organisms must be heritable E. Variation in the phenotypes of organisms within a populationarrow_forwardWhich of the following is true regarding vestigial traits? A. Vestigial traits are evidence for change over time B. Vestigial traits are evidence for common ancestry C. Vestigial traits indicate that not evolution does not perfect organisms A and B A, B, and Carrow_forwardRead the statement and state which evolution it is natural selection that leads to evolution of phenotypic differences A. Stabilizing selection b. Frequency dependent c. Sexual selection d. Diversifying seledtion e. Directional selectionarrow_forward
- Long bearded macaques are a (hypothetical) species of monkey who grow long white hair on their faces. A team of scientists studying a population of long bearded macaques notices that males with longer hair get more opportunities to mate and father more offspring. They hypothesize that long hair is adaptive in male monkeys. How should they test their hypothesis? a. Look for evidence of hair in the ancestors of macaques. b. Determine whether macaque hair length is heritable. c. Test if other traits in male macaques are also adaptive d. Test if male macaques who have had their faces shaved are still able to mate.* O e. Measure hair length of female macaques.arrow_forwardWhich of the following is NOT a correct statement regarding the neutral-mutation explanation for the high levels of genetic variation? A. Most genetic variation observed is adaptively neutral. B. Natural selection plays a lesser role in maintaining genetic variation. C. When natural selection occurs it leads to a decrease in genetic variation. D. Genetic variation is maintained mainly via the random effects of genetic drift.arrow_forwardLamarck's theory of inheritance of acquired characteristics did NOT include which of the following ideas? Select one: a. The environment plays a role in selecting favourable characteristics b. Physical characteristics acquired during a lifetime can not be passed to offspring c. Organisms can change during their own lifetime d. Physical activities can change organisms O O Oarrow_forward
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