Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 24-25 - Coggle Diagram
Chapter 24-25
Chapter 24
-
The separation of a group of organisms by a geographical barrier resulting in a differentiation of the original group into new varieties or species is referred to as
-
When a new species evolved from a surviving ancestral species that inhabited the same geographical area, it is called
-
Micro vs Macroevolution
Microevolution is small scale changes in gene frequencies from generation to generation, while macroevolution is large scale long term changes that result in new species
-
What are morphospecies
Morphospecies are groups of organisms being classified as the same species by shared characteristics or morphologies, not by genetic data or breeding behavior
-
A Hyrbid zone is a region in which members of differenct species meet and mate, producing at least some offspring of mixed ancestry
-
-
-
-
-
-
Chapter 25
Exaptations are traits that currently serve a function but was not originally produced by natural selection for that specific use
Fossil records use carbon 14 to determine age because carbon 14 decays at a continuous rate after the death of an organisms unlike carbon 12
Adaptations that facilitated reproduction and prevention of dehydration were necessary for life to evolve on land
-
-
-
-
Carbon dating can only be used to track back about 75,000 years
After both the Permian and Cretaceous mass extinctions, the percentage of marine predators increased
-
-
-
1920s A.l. oparin and J.B.S. Haldane hypothesized earths early atmosphere wasa reducing enviornment in which organic compounds could have formed from simpler molecules
1953 Miller and Urey tested the Oparin- Haldane hypothesis and found variety of amino acids that are found in organisms today