Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 20, Problem 3TY
Summary Introduction
Introduction:
Reproductive isolation occurs when two populations cannot produce fertile offspring by interbreeding. This is the major reason for
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Which of the following is a pre - zygotic barrier that can cause reproductive isolation ? Two fish who breed at different times of the year .
The fetus of the hybrid of two fish species cannot survive long enough to emerge from the egg .
The hybrid offspring of two fish species cannot reproduce
Which of these outcomes are examples of reproductive isolation? Select all that apply.
Individuals of different species are physically compatible and can engage in sex
Hybrid individuals cannot produce offspring
Hybrid individuals or their offspring have similar fitness to the original species
Reproduction occurs at different times
Mating occurs but fertilization does not occur
Which of the following could attribute to variation within a species? Choose all that apply.
Question 4 options:
phenotypic plasticity
age
ontogeny
sexual dimorphism
morphology
Chapter 20 Solutions
Principles of Biology
Ch. 20.1 - Prob. 1CCCh. 20.1 - Prob. 1TYKCh. 20.1 - Prob. 2TYKCh. 20.2 - Prob. 1BCCh. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Prob. 1TYKCh. 20.2 - Which of the following is not an example of a...Ch. 20.3 - Prob. 1BCCh. 20.3 - Prob. 1CC
Ch. 20.3 - Which of the following is an example of allopatric...Ch. 20.3 - Prob. 2TYKCh. 20.4 - Prob. 1CCCh. 20.4 - Prob. 2CCCh. 20.4 - Prob. 1TYKCh. 20 - Macroevolution refers to evolutionary changes that...Ch. 20 - Prob. 2TYCh. 20 - Prob. 3TYCh. 20 - Prob. 4TYCh. 20 - Prob. 5TYCh. 20 - Prob. 6TYCh. 20 - Prob. 7TYCh. 20 - Prob. 8TYCh. 20 - Prob. 9TYCh. 20 - Evolutionary changes in the rate or timing of...Ch. 20 - Prob. 1CCQCh. 20 - Compare and contrast different mechanisms of...Ch. 20 - A principle of biology is that populations of...Ch. 20 - Prob. 1CBQCh. 20 - Discuss the type of speciation (allopatric or...
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- Which of the following is not a post-zygotic isolating mechanism? Group of answer choices zygote mortality hybrid sterility temporal isolation F2 fitnessarrow_forwardWhich of the following are post-zygotic reproductive barriers?a. Different mating songs prevent mate recognitionb. Species A breeds in Spring, Species B breeds in summerc. Species A and B mate, but the embryos die before hatchingd. The gametes of species A aren’t compatible with the gametes of species Be. Species A and B can mate and produce healthy offspring, but the offspring are infertilearrow_forwardWhich 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_forward
- an example of a reproductive isolating mechanism. The example can be real species or a made-up example, explaining if its a prezygotic or postzygotic mechanism and why.arrow_forwardThe idea that asexually reproducing populations might acquire and maintain (and not "breed out") harmful genes is summed up in which? Group of answer choices that meiosis reduces the chromosome number in half "adverse parental genome applicational theory" the lock & key hypothesis of random fertilization "Mutational Reducto Theory" Muller's Ratchet theoryarrow_forwardPostzygotic reproductive barriers are related to the progeny. Which one is a result of allopolyploidy? Reduced hybrid fertility Reduced hybrid viability Gametic isolation Hybrid breakdownarrow_forward
- The reproductive isolating mechanism in which two closely related species live in the same geographic area but reproduce at different times is (a) temporal isolation (b) behavioral isolation (c) mechanical isolation (d) gametic isolation (e) hybrid inviabilityarrow_forwardTwo species of iguana in the Galapagos share a common ancestor from the mainland of South America. The two species live on the same island, but differ in the timing of their breeding seasons. This is an example of a ____. Hybrid breakdown Mechanical isolation Temporal isolation Gametic isolationarrow_forwardWhich of the following is true of a peacock's tail: It is a result of intersexual selection It is an example of sexual dimorphism in the species It is a result of intrasexual selection all of the abovearrow_forward
- Two species of frogs belonging to the same genus occasionally mate. Fertilization occurs, but the offspring fail to develop and hatch. Which reproductive isolating mechanism is acting to keep the two frog species separate? Group of answer choices hybrid inviability prevention of gamete fusion mechanical isolation behavioral isolation temporal isolationarrow_forwardSelect the correct phrases: (Prezygotic barriers / Postzygotic barriers) are reproductive isolating mechanisms that occur after a zygote has been formed. An example would be (an infertile hybrid / gametes that cannot fuse).arrow_forwardWhat is the nature of the reproductive barrier between a species that mates at dawn (sunrise) and a species that mates at dusk (sunset)? gametic temporal habitat behavioral mechanical One insect species mates on goldenrod flowers, while a second species mates on autumn daisies. The two species are mechanically compatible and the flowers bloom at the same time, but the insects do not interbreed. This is an example of __________ isolation. temporal habitat gametic mechanical behavioralarrow_forward
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