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FDSCI 101 Day 19

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by

Richard Datwyler

on 16 October 2013

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Transcript of FDSCI 101 Day 19

Welcome Back
Things to think about?
Descent with modification
Homologous/analogous structure
Three things are needed for speciation
Isolation
Divergence
Reproductive Isolation
What is a species?

Or what makes different species?
Mechanisms for Reproductive Isolation
Geographic
Ecological
Temporal
Behavioral
Mechanical
Gametic Isolation
Hybrid inviability
Geographic
Ecological / temporal
Test review question 1

Which of these shares a closer common ancestor to an Ameoba (kingdom protista)
A. Polar bear
B. Dinosaur
C. Fish
D. Grasshopper
E. All have the same common ancestor with a ameoba.
Test question 2.
This picture of mammalian fore limbs
is an example of
A. Homologous features
B. Analogous features
Test question 3
In microevolution mechanics, the bottle neck effect is an example of
A. Mutation
B. Gene Flow
C. Genetic Drift
D. Nonrandom Mating
E. Natural Selection
Evolution:
Do these phrases adequately classifly how evolutionary processes take place? For example
The salemanders in the coastal areas were more blue collored, because....
Need to...
Desire to...
Adapted to...
Full transcript