BIO120H1 Final: study guide/notes for why evolution is true

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turquoisekangaroo317

10 Jan 2011

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BIO120H1 Full Course Notes

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evolution erodes our sense of self, and our morality. two ideas that completely rejected god: natural selection and evolution. parts of the evolutionary theory: evolution- organisms undergo genetic change overtime depending on pressures, gradualism- it takes many generations to produce a substancial change, speciation(or splitting)- species split from a common ancestor. The common ancestor b/w descendant groups is called the missing link . The groups that split can no longer interbreed (unattractive mates, or sterile offspring etc) Speciation does not happen very often, but when it does, the number of opportunities for future speciation are doubled: common ancestory- flip side of speciation, means we have a common ancestor. Mammals and reptiles are joined by having an amniotic egg nested hieracy. If speciation is true, then common ancestry is true: natural selection- survival of the fittest. Wooly mammoth got coolderthose with think hair genes survived, passed on genes. Mutations sometimes lead to the perfect design (rhinos with antlers)

Related Questions

Evolution and Speciation

Define evolution. Why is it inaccurate for creationists to tout evolution as âjust a theoryâ? (Think about what theory actually means in scientific terms vs. the use of the word âtheoryâ in casual conversations).

Explain what the Hardy-Weinberg equilibrium shows and describe the conditions necessary for the equilibrium to be maintained.

Explain what factors cause populations to diverge from the Hardy- Weinberg equilibrium and how each factor causes the change.

Describe how species evolve via natural selection. (Be sure to discuss the key aspects of natural selection: variation, heredity differential survival and reproductive success in your answer).

What does speciation mean and how can it occur?

What does adaptation mean? Why is natural selection the only agent of evolutionary change that leads to adaptation? (Think about how natural selection works).

Is natural selection all powerful? Can it create any variation that you or I could think of? Why or why not?

Differentiate between natural and sexual selection.

What is reproductive isolation?

Describe prezygotic and postzygotic mechanisms of reproductive isolation and explain how they can contribute to speciation.

Distinguish between allopatric and sympatric speciation and explain how each leads to new species.

What is adaptive radiation?

Be able to read and interpret phylogenetic trees: be able to determine which species are most closely related to each other, what nodes represent, where common ancestors would be located, etc.

What are paraphyletic, polyphyletic and monophyletic groups within a phylogeny?

viridianmanatee515

Which of the following is NOT true about the evolution of multicellularity?

Question 9 options:

	Multicellularity arose in the common ancestor of animals and fungi
	Multicellularity likely enabled early aquatic species to escape predation.
	Multicellularity likely arose in a similar way but involving different genes in an ancestor of plants, and an ancestor of animals
	In the common ancestor of the land plants and charophytes, multicellularity likely arose when a cell wall gene developed a "sticky" function
	Multicellularity enabled the evolution of specialized cells.

sangriatermite542

1) Parents from two different species mate and produce a fertileoffspring with a polyploid chromosome number. This is called

	allopolyploidy
	allopatric speciation
	triploidy
	mutation selection
	autopolyploidy

2)A monophyletic group would be best described as:

	a grouping of most, but not all, species descended from a commonancestor
	a grouping of all species descended from a common ancestor,including that ancestor
	a grouping of all species descended from a common ancestor,excluding that ancestor
	a grouping of all species that share a similar set of traits,regardless of whether the traits are homologous or analogous

3) Vicariance refers to:

	a pattern of speciation whereby new species evolve reproductiveisolation in sympatry
	a kind of speciation where a small group of colonists founds apopulation on an island habitat
	a pattern of speciation in which a population is subdivided by ageographical barrier
	a technique for constructing phylogenetic trees based onsynapomorphies

rubymosquito920

BIO120H1 Final: study guide/notes for why evolution is true

BIO120H1 Full Course Notes

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