Chapter 16-Origin of Species

Chapter 16-Origin of Species - Chapter 16:The Origin of...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
Click to edit Master subtitle style Chapter 16:The Origin of Species Evolution: Speciation
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Same or Different
Background image of page 2
Same or Different
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Same or Different
Background image of page 4
Same or Different
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Speciation If evolution is basically organisms changing over time, then changes could lead to the development of new species .
Background image of page 6
Species A population of reproductively isolated organisms. Only members of the same species can reproduce together and produce fertile offspring in nature.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Reproductive Isolating Mechanisms {3968F7 D-418 -414E-9 41-B 371C745F5A} Reproductive isolation {495D0E1 -C 9 -4B67-91CE-58E809495C42} Premating {3027F9F8-7A D-4A8E-8 F5-984521A9AD17} Geographic ogical {71 052AC-2B63-43D5-83A4-1387A30E32FD} Postmating nviability poral ble gametes {293B3F5E-3AC2-4E6 -ADF0-CA1AD13 9B87} Hybrid infertility vioral incompatible
Background image of page 8
Pre-mating Mechanisms These mechanisms prevent the mating act from taking place. Geographical Isolation Ecological Isolation Temporal Isolation Behavioral Isolation Mechanical Isolation
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Geographical Isolation Mating is prevented because the organisms don't live together . If one population of turtles lives in ponds while another lives in streams and they never leave their habitat, they will not encounter each other so they can't mate. This would qualify them to be considered different species.
Background image of page 10
Geographical Isolation
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Ecological Isolation Two populations that use different resources may spend time in different habitats within the same general area . 750 species of fig wasps each breed in and pollinates the fruits of a particular species of fig, and each fig species hosts one and only one species of wasp.
Background image of page 12
Ecological Isolation
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mating is prevented because the two groups of organisms mate at different times or seasons. If one group of birds mates in the spring while another groups mate in the summer they will never mate with each other. This would qualify them to be considered
Background image of page 14
Image of page 15
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/27/2011 for the course BIO 112 taught by Professor Kirkpatrick during the Spring '11 term at Moraine Valley Community College.

Page1 / 49

Chapter 16-Origin of Species - Chapter 16:The Origin of...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online