WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 16, Problem 4MC
Summary Introduction
Introduction:
Among the three areas of resource allocation – growth, reproduction and survival, one is reduced and another is given a higher investment and increased, when
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Which of the following statements does not support the conclusion that giraffes are k-selected species? a. Giraffes are approximately 6’ tall and weigh 150 lbs at birth. b. Wild giraffes begin mating at 6-7 years of age. c. Newborn giraffes are capable of coordinated walking within an hour of birth, and running within 24 hours of birth. d. Giraffes rarely give birth to twins.
Which of the following traits is more associated with an Opportunistic (Equilibrial) species?
Which of the following traits is more associated with an Opportunistic (Equilibrial) species?
A.
Short maturation time
B.
Producing offspring at many different times over the course of life
C.
Producing a lot of eggs at one time
D.
High juvenile mortality
E.
High level of parental care
A subpopulation of a species of birds migrates to a different location from the rest of the species for breeding purposes. How might the genes change in the subpopulation?
A.
Their genes would change randomly and eventually revert to normalcy, which would allow the subpopulation to return to the main population.
B.
Their genes would change to better allow them to survive and reproduce in their new location.
C.
Their genes would not change at all and they would merely be a subpopulation living in a different location.
D.
Their genes would change so that they would continue to be well-adapted to their former location.
Chapter 16 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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- Which statement best explains why an understanding of life-history trade-offs is important when examining the fitness of an organism? A. Because individuals may not be producing the maximum number of offspring they possibly can in any particular breeding season. B. Because in any particular breeding season, individuals may need to produce fewer offspring to enhance their own survival. C. Because individuals need to live longer, so they will not produce the maximum number of offspring each season. D. Because when individuals need offspring, they can choose whether to reproduce or not.arrow_forwardWhat factors influence gene flow between populations?A. The home range size of the species.B. Differences in animal behavior and life history strategies can form effective barriers to gene flow.C. Barriers to gene flow between populations are always physical geographic barriers.D. Reproductive barriers must involved anatomical differences that prevent mating.arrow_forwardThe best argument for how an unprotected species can evolve to mimic a second protected species (distasteful or noxious) and thus obtain protection is by A. Random changes in the appearance of the unprotected species that lead to increased fitness due to greater similarity with the protected species B. Individuals deciding that they need protection and mutating to look like the protected species C. Individuals changing their diet to increase pigment production to look like the protected species D. Natural selection for more advanced traits that are better to the inferior traits of organisms that do not look like the protected species E. Behavioral modification of the unprotected species to act like the protected speciesarrow_forward
- Suppose two species of morning glories are reproductively isolated because in one species the flowers bloom in early April and in the other species they flower in mid-May. This would be an example of _______ isolation, which is a form of _______ isolation. a. habitat; prezygotic b. temporal; prezygotic c. temporal; postzygotic d. behavioral; postzygotic e. habitat; postzygoticarrow_forwardHow do hatcheries (i.e. farmed salmon) impact wild salmon population genetics? A: Increase species variability between different populations B: Decrease the resilience of wild populations C: Decrease mixing between different populations D: Overcrowd streams when they return to where they were spawnedarrow_forwardIndividuals in a population of sunflowers have a range of flower sizes, and the average diameter of their flowers is 5 cm. What effect would selection have on flower diameter in this population of sunflowers? A. The average flower diameter may not change if the population is under disruptive selection. B. Small flowers are favoured if the population is under disruptive selection. C. The average flower diameter will increase if the population is under stabilizing selection. D. Large flowers are favoured if the allele for flower size is dominant when the population is under directional selection.arrow_forward
- Which of the following traits does not describe a r-selected species? A. rapid development B. low parental investment C. high reproductive rates D. short life spans E. late maturationarrow_forwardWhen taking the question, it would appear as: Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural selection? A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome B.species from warmer climates are likely to expand their ranges into higher latitudes C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population D.the stress caused by higher temperatures will increase mutation ratesarrow_forwardPrimates are examples of: a. density-dependent species b. density-independent species c. r-selected species d. K-selected speciesarrow_forward
- Which of the following is an example of postzygotic reproductive isolation?a. Sperm of species A dies in the oviduct of species B before fertilization can take place.b. Hybrid zygotes between species A and B are spontaneously aborted early indevelopment.c. The mating seasons of species A and B do not overlap.d. Males of species A are not attracted to the pheromones produced by the females ofspecies B.arrow_forwardThe Grants have studied finches on the Galapagos Islabds for 40+ years. During times of drought there is less green/flowering vegetation available as a good source for the finches. This leaves only the hard seeds. The grants have found that during drought, finches with larger beaks survive at a higher rate because they can access food source. This would be an example of ____ A.Selective pressure B. good genes hypothesis C. handicap principle D. population variationarrow_forwardSome females seem to prefer the green colouration and some females seem to prefer the blue colouration. What type of selection is this an example of? a. stabilizing b. balancing c. directional d. diversifyingarrow_forward
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