Quiz 9 Flashcards
Which of the following was NOT an observation Darwin made in formulating a model of Evolution by Natural Selection.
Organisms within their lifetime change in response to stimuli from their environment.
Natural selection is sometimes described as “survival of the fittest”. Which of the following best measures an organism’s fitness.
How many fertile offspring it produces.
In a population with two alleles, B and b, the allele frequency of b is .4. B is dominant to b. What is the frequency of individuals with the dominant phenotype if the population is in Hardy-Weinberg equilibrium?
.84
Name two conditions that must be true for the Hardy-Weinberg equilibrium to be in effect.
There should be a large population
There should be no natural selection.
A form of natural selection where one extreme of a continuously variable character are selected for is called
Directional Selection
The inheritable variation in a populations originates from:
Random Mutation
What is the closest relative(s) to the Indian Cobra?.
The Western Rattlesnake
What is the closest relative(s) to the Bearded Dragon?
The Indian Cobra and Western Rattlesnake
A precocious kid will tell you that the Bearded Dragon and Gecko belong to a group called “lizards”. Is this a valid (monophyletic) biological group? Why or why not?
No. A monophyletic group is a group of organisms, their most recent common ancestor, and all of that ancestor’s descendants. The most recent common ancestor of the two lizards has the snakes as their descendants.
