Postzygotic - Study guides, Class notes & Summaries

SCIN130 Chapter 16 UPDATED ACTUAL Questions and CORRECT Answers Which of the following is/are an example(s) of a postzygotic isolating mechanism? - CORRECT ANSWER- Hybrid sterility Zygote mortality Two different species attempt to reproduce, but their offspring is unable to undergo proper mitosis because it has two different sets of chromosomes. This type of reproductive barrier is best described as __________ mortality. - CORRECT ANSWER- zygote

BIO 345 Final Exam | Questions and Answers (Complete Solutions) Which pattern best characterizes the history of extinctions on Earth? A. An increasing per capita background extinction rate B. Five major mass extinctions and several lesser episodes of heightened extinction rates C. Three major mass extinctions and several lesser episodes of heightened extinction rates D. Three major mass extinctions and a low background extinction rate E. An increase in the number of mass extinctions over time...

Biology 1108 Unit 1 EXAM Questions and Answers 100% Pass The term "n" refers to the size of a population, that is, the number of individuals in that population. In general, in a sample of n individuals, the frequency of an allele is: A)the number of occurrences of the allele. B)the number of occurrences of the allele divided by n. C)the actual value of n D)the number of occurrences of the allele divided by twice the number of individuals in the sample (2n). E)twice the number of occur...

_________ is the science of classifying living things. - taxonomy _________ is the science of classifying living things. - Taxonomy A ___ group does not contain the most recent common ancestor - polyphyletic A _________ group consists of the most recent common ancestor and some of its descendants. - paraphyletic A ______________ group consists of the most recent common ancestor and all of its descendants. - monophyletic A ______________ group does not contain the most recent common ancest...

micro-evolution - Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" macro-evolution - Major changes in the history of life, origin of new species, generates biological diversity "big changes" species - -a group of populations whose members can interbreed -produce fertile offspring allopatric speciation - -Species evolve in geographic isolation, usually bc of a geographic barrier -...

Oliver Ljustina // Exam 1 Bio 107 Questions and Answers Graded A+ macroevolutionary processes Large changes which occur over long time periods and result in new species describe Ernst Mayr said: population or group of populations whose members can interbreed and produce fertile offspring reproductive barrier interruption in courtship, fertilization, embryo formation or offspring developmenreproduct prezygotic barriers barriers occur before the formation of the zygote or fertilized egg...

BIO 202 Exam 1 Questions With 100% Correct Answers Updated 2024/2025 (Graded A+) When was earth formed? - correct answer 4.55 billion years ago When did life on earth first appear? - correct answer 3.5 billion years ago What are the evolutionary mechanisms? - correct answer *Nonrandom mating *Migration *Genetic drift *Natural selection When does allopatric speciation occur? - correct answer when members of the same species become geographically separated When does sympatric speciation oc...

BIO 202 Exam 1 Questions With Correct Answers Updated 2024/2025 Graded A+ | Verified Answers. What are the properties of life? - correct answer *Cells and organization *Energy use and metabolism *Environmental response *Regulation and homeostasis *Growth and development *Reproduction *Biological evolution When was earth formed? - correct answer 4.55 billion years ago When did life on earth first appear? - correct answer 3.5 billion years ago What are the evolutionary mechanisms? - corre...

MCAT Biology Exam Latest Updated 2024 With Complete Solutions Natural selection (types) Different types of selection lead to changes in phenotype: 1) Stabilizing selection 2) Directional selection 3) Disruptive selection 4) Adaptive selection Stabilizing selection Keeps the phenotypes in a narrow range, excluding extremes. Directional selection Moves the average phenotype toward one extreme. Disruptive selection Moves toward two different phenotypes at the extremes and can lead to sp...

SCIN130 Chapter 16 Exam Questions and Answers 100% Pass Which of the following is/are an example(s) of a postzygotic isolating mechanism? - Answer-Hybrid sterility Zygote mortality Two different species attempt to reproduce, but their offspring is unable to undergo proper mitosis because it has two different sets of chromosomes. This type of reproductive barrier is best described as __________ mortality. -Answer-zygote The evolutionary history of a group of organisms is called _____. -An...