BSC 2010 Chapter Notes - Chapter 24: Reproductive Isolation, Macroevolution, Microevolution

15 views3 pages

sapphirewildebeest248

27 Aug 2016

School

University of Florida

Department

Biology - Biological Sciences

Course

BSC 2010

Professor

Korolev Maria

For unlimited access to Textbook Notes, a Class+ subscription is required.

Document Summary

Divisions of organisms into discrete units called species. If two organisms look different enough, then they are considered different species: biological species concept. Population or group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring. This population is unable to produce viable, fertile offspring with members of another population. Change in the genetic makeup of a population over generations. Changes (adaptations) confined to a particular gene pool or population: macroevolution. Speciation: the process that produces a new species, may be the result of microevolution or macroevolution. Reproductive isolation: biological barriers that impede members of 2 species from producing viable, fertile offspring, there are 2 types of barriers that lead to reproductive isolation. 2 species occupy different habitats in the geographic area: tree-dwelling species, bush-dwelling species, temporal isolation. Species breed at different times: different time of day, different seasons, or different years, behavioral isolation.

Related Questions

1. Scientists found that different beak shapes lead to differentmating songs in Darwin's finches. This result best supports whichhypothesis?

	A. Darwin's finches are not different species according to theBiological Species Concept.
	B. Behavioral isolation in Darwin's finches is unrelated to beakshape.
	C. Adaptation to different food sources likely occurred afterreproductive isolation in Darwin's finches.
	D. Adaptation to different food sources indirectly led tobehavioral isolation in Darwin's finches.

2. Which of the following could occur if two partiallyreproductively isolated populations become sympatric? Check allthat apply.

	A. Gene flow between the populations will occur
	B. The populations may eventually become separate speciesthrough reinforcement
	C. The populations will continue to be partially reproductivelyisolated
	D. The populations may eventually lose their geneticdistinctiveness
	E. Hybrids will be inviable or infertile

3. In which population would the rate of genetic drift be thegreatest?

	A large population that is geographically isolated from itsparent population
	A small population that is geographically isolated from itsparent population
	A large population that is not completely geographicallyisolated from its parent population
	A small population that is not completely geographicallyisolated from its parent population

4. Indicate true or false that the following organisms would beconsidered separate species according to the biological speciesconcept. (T/F)

1. Lions and tigers can interbreed successfully to produce viable,fertile offspring, but lions live in open grasslands and tigerslive in dense forests. (T/F)
2. Black bears in the United States can have coat colors rangingfrom blonde to jet black, but bears with different coat colorsoccupy the same habitat and interbreedsuccessfully. (T/F)
3. Many leopard frogs in the eastern United States look the sameand can mate to produce a fertilized egg, but the embryo does notdevelop past the early stages. (T/F)
4. Many of Darwin

cyanbuffalo931

BSC 2010 Chapter Notes - Chapter 24: Reproductive Isolation, Macroevolution, Microevolution

Document Summary

Get access

Related Documents

BSC 2010 Lecture Notes - Lecture 33: Species Problem, Species Complex, Binomial Nomenclature

BSC 2010 Lecture Notes - Lecture 20: Zygote, Chromosome, Sympatric Speciation

BSC 2010 Chapter Notes - Chapter 17: Disruptive Selection, Zygote, Genetic Drift

Related Questions