1. Mutations within a DNA sequence _____________.
Choose all that apply * are natural processes
always affect the phenotype. are unnatural processes.
decreases genetic diversity.
increases genetic diversity. never affect phenotype.
2.
A process by which individuals that are better suited to theirenvironment survive and reproduce most successfully best describes:*
acquired characteristics
the bottleneck effect
natural selection
mutations
3.
A biologist analyzes the DNA sequences in three differentlizards. The biologist finds that lizards A and B have nearlyidentical DNA sequences. The DNA sequences in lizard C aresignificantly different from those of lizard A. From thisinformation, the biologist may infer that : *
Lizards A and B are more closely related to each other thaneither is to Lizard C.
All three lizards appeared on Earth at about the same time.
Either lizard A or lizard B must be a direct ancestor of lizardC.
Lizard C must have been the ancestor of both lizard A and lizardB.
4.
Light peppered moths were more common in England than darkpeppered moths. When factories started to produce pollution in thearea, the bark on the trees were stained black. What is the likelyoutcome from this event? *
The white moths would reproduce more so they don't goextinct.
The white moths would most likely decrease in numbers becausethey are easier to be seen and caught by birds
The dark moths would decrease in numbers because their homeschanged colors.
There would be no change in the moth populations.
5.
Which of these BEST illustrates Natural Selection? *
An organism with favorable genetic variations will tend tosurvive and breed successfully.
A population monopolizes all of the resources in its habitat,forcing other species to migrate.
A community whose members work together utilizes all existingresources and migratory routes.
The largest organisms in a species receive the only breedingopportunities.
6.
When individuals in one population are unable to breed withindividuals in a different population due to geographic isolation,this may lead to: *
speciation
gene flow
bad luck
mutations
7.During their early stages of development, the embryos ofreptiles, birds, and mammals look very similar. This suggests thatreptiles, birds, and mammals... *
have a common ancestor.
live in the same types of environments.
are no longer undergoing evolution.
have lost their vestigial structures.
8.Possible sources of genetic variation in a gene pool are:Choose all that apply. *
asexual reproduction
sexual reproduction
spontaneous generation
mutation
death
9.Which of the following statements are part of Darwin's theoryof Natural Selection? Choose all that apply. *
more individuals are produced than can survive
there is genetic variation among individuals within apopulation
individuals within a population must compete for resources
individuals protect the weak within a population
10.Different species of frogs mate at different times of theyear. This separation, which has caused them to remain separatespecies is an example of *
Geographic isolation
Genetic isolation
Temporal isolation
Behavioral isolation
11.How does Natural Selection determine which genetic traits arepassed on to the next generation? *
Better adapted organisms tend to produce more offspring than\"less fit\" organisms.
Better adapted organisms tend to have no advantage over \"lessfit\" orgaonisms.
Better adapted orgaisns tend to kill \"less fit\" organisms.
Better adapted organisms tend to take resources from 'less fit\"organisms.
Evolution can best be described as *
a process of change over time.
the formation of fossils.
a process of growth in an organism.
the change in size of body structures through use and disuse
