BIO120H1 Chapter 17: Bio Chapter 17.doc

57 views1 pages

azureotter600

22 Apr 2012

School

Department

Course

Professor

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

shdhhfhshhpla3806 and 40102 others unlocked

BIO120H1 Full Course Notes

Verified Note

36 documents

Document Summary

Chapter 17 evolution of species interaction (346-458, c; 359-362, a; 363-366, c) Crypsis: the blending of an organism with its background by matching colour and pattern of bark, twigs or leaves; employed by palatable organisms (e. g. stick insect). Warning colouration/aposematism: the advertisement of unpalatability with bright, recognizable colours or patterns (e. g. monarch butterfly). Batesian mimicry: a palatable organism will mimic the colouration of an unpalatable one to confuse predators. Mullerian mimicry: several unpalatable organisms will resemble each other"s colouration to more efficiently teach predators to avoid them. With sufficient variety in resource, specialization can decrease competition and promote coexistence between two species. Although related species that live together differ in their utilization of resources, one cannot assume this is because of a prior history of interaction. Sympatric: the geographic ranges of two species overlap. Allopatric: the geographic ranges of two species do not overlap.

Related Questions

8. What is the assumption used when arranging species on aphylogenetic tree?

Polyploid species were directly related to similarspecies.
Species were able to evolve independently on differentcontinents.
Organisms with the most traits in common are the most closelyrelated.
When a species was formed can determine the species to which itis most closely related.

9. Speciation is a form of...

microevolution.
macroevolution.
artificial selection.
natural selection.

10. The difference between the processes involved in allopatricspeciation and sympatric speciation is...

sympatric speciation occurs much more slowly.
sympatric speciation requires interaction with anotherspecies.
allopatric speciation requires geographic isolation.
allopatric speciation occurs through the formation of sets ofthree or more chromosomes.

viridianlocust350

9. Some insect herbivores that are specialized to feed on plants that contain poisons are frequently brightly coloured and conspicuous as adults. Other species that feed on the same plants, however, are camouflaged and cryptic. Which of the following is the most likely explanation of the difference? a. Poisonous chemicals are brightly coloured, so eating them changes the colour of the insects. b. The cryptic herbivores break down the poisons, but the bright ones tolerate the poisons, incorporate them into inactive tissues, and evolve warning colouration. .C. Bright insects scare away other herbivorous species that also feed on the poisonous plants. d. The bright species are mimics of other insect species, but the cryptic ones have no models to mimic.

Which of the following scenarios would most liekly lead to resource partioning and consequently contribute to ecosystem stability?

a. sympatric populations of the same animal species

b allopatric populations with organisms that share the same niches

c. sympatric population with organisms that share same niches

d. allopatric population of same species

BIO120H1 Chapter 17: Bio Chapter 17.doc

BIO120H1 Full Course Notes

Document Summary

Get access

Related textbook solutions

Molecular Cell Biology

Biology: Science for Life with Physiology

Concepts of Biology

Biology

Essentials of Biology

Related Documents

BIOL100 Lecture Notes - Competitive Exclusion Principle, Directional Selection, Commensalism

BIOL 373 Lecture Notes - Directional Selection, Competitive Exclusion Principle, Commensalism

BIO 2129 Lecture Notes - Directional Selection, Commensalism, Competitive Exclusion Principle

Related Questions