WHAT IS LIFE?:GDE.TO BIO....W/PHYS.(LL)
5th Edition
ISBN: 9781319360696
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 16, Problem 8MC
Summary Introduction
Introduction:
The average life span of a population is influenced by environmental factors and natural selection.
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Sexual reproduction provides an advantage to organisms because it increases the
A.
size of the genome of a species.
B.
genetic variability in a population.
C.
fitness of individual alleles of a gene.
D.
number of mutations during cell division.
Which of the following statements is an evolutionary advantage of sex and sexual reproduction?
A. Sex and recombination results in decreased genetic variation in a population and maintains advantageous traits.
B. Sex and recombination can bring beneficial alleles together when producing offspring.
C. Sex and recombination results in the inheritance of all the genetic information available from both parents.
D. Reproduction is less risky when gametes from two individuals must fuse.
Mutations cause variations among individuals. If these variations provide an advantage to individuals, then the resulting traits are known as adaptations. Which of the following statements about adaptations is incorrect?
A. They are structural or physiological in nature.
B. They modify the behaviour of organisms.
C. They provide a selective advantage in any environment.
D .They increase reproductive success of organisms.
Chapter 16 Solutions
WHAT IS LIFE?:GDE.TO BIO....W/PHYS.(LL)
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- Under a simple model, the evolution of asexual reproduction strategies will take over a population. The model relies on two assumptions. Which of the following are the assumptions? a. Reproductive mode does not affect how many offspring are produced by a female. b. Reproductive mode does not affect the sexual selection on males c. Reproductive mode does not affect the probability of offspring survival d. Both a. and b. e. Both a. and c.arrow_forwardIn the movie on rock pocket mice, what did the team discover about black colouration? Select the ONE BEST answer. a. Fur colouration is the result of a new adaptive behaviour where pocket mice rolled in lava dust to camouflage themselves. b. It is the result of the same, single mutation in all populations. C. Different mutations cause similar dark colouration in different populations. d. One specific mutation causes black or white fur depending on the population. e. Fur colouration is the result of dietary changes in different environments, not natural selection.arrow_forwardConsider all of the species on earth. Some scientists believe that the genes for growth and reproduction have been under evolutionary forces for longer than those involved in maintenance and repair. Which statement below best supports their theory? a. Most species die after producing offspring. b. “Survival of the fittest” is true. c. Most animal species mate for life. d. Only the more intelligent organisms live long lives.arrow_forward
- Hox genes are activated in specific regions of the body (e.g. back of the head) and activate other genes to build specific structures in those regions. This was largely discovered by looking at the effects of mutants of the various hox genes. What other technique would provide information on the action of hox genes? Group of answer choices A. copy hox genes and place them in bacteria B. copy hox genes and place them in plants C. completely remove all hox genes from the genome D. change the control of hox genes so that they are expressed in different body regions E. reverse the order of the hox genes on the chromosomearrow_forwardThe Brachyury and Tbx5 in vertebrates and the Ap3 gene in flowering plants a. are examples of Hox genes. b. are examples of co-opting a gene for a new function. c. are homologues for determining the body plan of eukaryotes. d. help regulate the formation of appendages.arrow_forwardEusociality and haplo-diploidy, in ants and bees, are often (though not always) correlated because… Group of answer choices: A. having twice as many genes allows queens to be far more capable of controlling other individuals. B. being able to control the sex of offspring allows parents to regulate the amount of cooperation. C. a worker can have more of her genes passed on in a new sister than in an offspring of her own. D. males have fathers but females don’t. E. it allows high levels of inbreeding to evolve without negative effects.arrow_forward
- That African infants tend to walk earlier than Western infants suggests that walking: a. that race determines the earliest age of walking. b. is a completely adaptive behaviour to the particular environment in which the infant is raised. c. is not completely controlled by genetics. d. follows a proximodistal progression.arrow_forwardWhich statement is correct, based on current evolutionary theory? a. Selection will favor alleles only if they are good for the species. b. Selection will favor alleles only if, on average, they increase the reproductive success of individuals who have them. c. In small populations genetic drift can be more effective than natural selection in building adaptations. d. Selection sometimes favors alleles that systematically lower the reproductive success of the individuals who have them. e. Two of the above are correct.arrow_forwardThe twofold cost of sex model by John Mynard Smith explains how - A. asexual females can become predominant in a population. B. anisogamy results in sexual reproduction. C. sexual individuals can produce genetically variant offspring. D. asexual females invest as much in offspring as the sexual females.arrow_forward
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