EBK BIOLOGY
4th Edition
ISBN: 8220102797376
Author: BROOKER
Publisher: YUZU
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Chapter 25, Problem 7TY
Summary Introduction
Introduction: Polyploidy occurs when the cells undergo karyokinesis (a division of nucleus) but fail to undergo cytokinesis (a division of cytoplasm). This results in an increase in the haploid sets of chromosomes in the cells. The polyploidy might give rise to triploid, tetraploid, and hexaploid organisms. This is only present in plants and not in animals.
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3) Allopolyploidy involves
a.a genetic divergence that results in nonviable offspring.
b.a decrease in chromosome number within a single species.
c.an increase in chromosome number following hybridization of different species.
d.an increase in chromosome number within a single species.
which statement is false?
1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span.
2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.
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.
Chapter 25 Solutions
EBK BIOLOGY
Ch. 25.1 - Can you think of another example of two different...Ch. 25.1 - Prob. 1BCCh. 25.1 - Is temporal isolation an example of a prezygotic...Ch. 25.1 - Prob. 3CCCh. 25.2 - Prob. 1BCCh. 25.2 - Prob. 1EQCh. 25.2 - Prob. 2EQCh. 25.2 - Prob. 3EQCh. 25.2 - Prob. 1CCCh. 25.2 - Prob. 2CC
Ch. 25.4 - Evo-Devo: Evolutionary Developmental Biology...Ch. 25.4 - Prob. 2CCCh. 25.4 - Prob. 1BCCh. 25.4 - Prob. 3CCCh. 25 - Macroevolution refers to evolutionary changes that...Ch. 25 - Prob. 2TYCh. 25 - Prob. 3TYCh. 25 - Prob. 4TYCh. 25 - Prob. 5TYCh. 25 - Prob. 6TYCh. 25 - Prob. 7TYCh. 25 - Prob. 8TYCh. 25 - Prob. 9TYCh. 25 - Prob. 10TYCh. 25 - What is the key difference between prezygotic and...Ch. 25 - What are the key differences between gradualism...Ch. 25 - Prob. 3CQCh. 25 - Prob. 1COQCh. 25 - Discuss the type of speciation (allopatric or...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In Figure 2 a diagram shows how traits are shared (or not shared) in different generations. Based on the diagram: a. A, represents a plesiomorph trait. In how many generations is A shared (symplesiomorph)? b. C represents an apomorphictrait. What generations share C (synapomorphy)? c. E is considered an autapomorphic trait. Why do you think? d. What about B and D? How do we classify them?arrow_forwardSpecies recognized by the phylogenetic species concept a. sometimes also would be recognized as species by the biological species concept. b. are sometimes paraphyletic. c. are characterized by symplesiomorphies. d. are more frequent in plants than in animals.arrow_forwardAllopatric, but not sympatric, speciation requiresa. reproductive isolation.b. geographic isolation.c. spontaneous differences in males and females.d. prior hybridization.e. rapid rate of mutation.arrow_forward
- The formation of polyploids is common in plants and can abruptly produce a new species. This is an example of a. allopatric speciation. c. sympatric speciation. b. parapatric speciation. d. all of the above.arrow_forwardWhich of the following observations would provide the strongest evidence that two plants belong to different biological species? a.The leaves and flowers show morphological differences. b.There are variations in their RNA sequences. c.They produce viable but sterile offspring. d.They occupy unique habitats in an ecosystem.arrow_forwardHybridization between incompletely isolated populations a. always leads to reinforcement due to the inferiority of hybrids. b. can serve as a mechanism for preserving gene flow between populations, thus preventing speciation. c. only occurs in plants. d. never affects rates of speciation.arrow_forward
- Which of the three phylogenetic trees of the Drosophila species is different from the other two? a. D. simulans b. C. D. sechellia D. melanogaster D. sechellia D. simulans D. simulans Tree 1 Tree 2 Tree 3 D. melanogaster D. melanogaster D. sechellia D. pseudoobscura D. pseudoobscura D. persimilis D. persimilis D. persimilis D. pseudoobscuraarrow_forwardDefine speciation genes. and What is the importance of speciation genes?arrow_forward1) In allopatric speciation, geographic separation of two populations a.reduces the relative fitness of hybrid offspring. b.is sufficient for speciation to occur. c.allows gene flow between them. d.inhibits gene flow between them.arrow_forward
- Which of the following best describes Muller's ratchet? a. Asexually reproducing lineages are more prone to attack from parasites. b. Asexually reproducing species are less likely to go extinct over time. c. Asexually reproducing species accumulate mutations and can not remove them from lineages because mutations are passed down to all offspring. d. Asexually reproducing species are less likely to evolve parental care over time.arrow_forwardWhich of the following best explains the morphological species concept?arrow_forwardWhile donkeys and horses have ignored each other historically in the wild, hybrids can be made through artificial insemination. The resulting hybrids are unusual in that they are generally viable, but always sterile. Because of their sterility, a blended lineage of the two animals cannot exist. What evolutionary force is this an example of? A. Prezygotic barrierB. Postzygotic barrierC. Allopatric SpeciationD. Sympatric Speciationarrow_forward
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