Sympatric speciation - Study guides, Class notes & Summaries

Macroevolution changes in a population over very long periods of time. Speciation the splitting of one species into two or more new species Biological Species Concept offers testable way to define a species that does not depend on appearance: The members of a species interbreed and have a shared gene pool, & each species is reproductively isolated from every other species. Gene flow occurs between the populations of a species, but not between pops of diff species. Biolo...

JMU BIO 150 Exam 2 Define macroevolution ️evolutionary change above the species level, including the origin of a new group of organisms or a shift in the broad pattern of evolutionary changes over time How do we identify a species? ️groups of actually or potentially interbreeding populations that are reproductivley isolated from other such groups Define reproductive isolation ️cannot produce viable offspring Define viable ️offspring can reproduce Define speciation ️splitt...

What is micro-evolution? - Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" What is macro-evolution? - Major changes in the history of life, origin of new species, generates biological diversity "big changes" What is a species? - a group of populations whose members have the potential to interbreed with one another in nature to produce fertile offspring What is allopatric speciation? - ...

A population of rodents, called population A, lived on a large landmass. One group of the population dispersed to a nearby island. Two million years later, the island population split into two smaller, equalsized populations when a river formed across the middle of the island. Now two new species, A1 and A2, have evolved on the island. They have replaced the population from which they were derived. Use the image to answer the question.Which diagram represents the phylogeny of the populations ...

What is some evidence for endosymbiosis? - -Mitochondria replicate similar to binary fission -plastids have circular chromosomes -ribosomes are similar to prokayotes What is Hardy Weinburg equilibrium? - p^2 + 2pq+ q^2 =1 -If a population is at equilibrium, (percentages don't change) -No genetic drift, gene flow, no natural selection, no new alleles, no sexual selection -Genetic drift, gene flow, and natural selection cause most evolutionary change Acquired vs. Inherited traits - Acquire...

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...

Biology 1108 final exam Questions and Answers 100% Pass Monophyletic Group - Correct Answer ️️ -includes all the descendants of a common ancestor, and its considered a natural grouping of organisms based on a shared ancestry. Paraphyletic Group - Correct Answer ️️ -some (not all) of descendants of a common ancestor Polyphyletic Group - Correct Answer ️️ -organisms from distinct lineages based on shared characters, but no common ancestor Homologies - Correct Answer ️️ -si...

Contrivance - an adaptation that is a result of the modification of a previous ancestor Adaptation - A trait that helps an organism survive and reproduce Exaptation - evolutionary adaptation of an existing structure for a completely new purpose Vestigial Trait - A trait inherited from a common ancestor but is no longer used dipliod cell - cell that has 2 copies of each chromosome, one from egg, one from sperm (46) Hapliod - having a single set of unpaired chromosomes, one egg (23)...

What is micro-evolution? Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" What is macro-evolution? Major changes in the history of life, origin of new species, generates biological diversity "big changes" What is a species? a group of populations whose members have the potential to interbreed with one another in nature to produce fertile offspring What is allopatric speciation? Speci...

AP BIOLOGY MIDTERM EXAM which of the following principles is NOT part of Darwin's original theory of evolution by natural selection? A. Evolution is a gradual process that occurs over long periods of time. B. Variation occurs among individuals in a population. C. Mutations are the ultimate source of genetic variation. D. More individuals are born than will survive. C If a population is ini Hardy Weinberg equilibrium then: A. it is evolving to adapt to environmental changes B. the f...