WorksheetsEvolution
Total questions: 73
Worksheet time: 18hrs 15mins
A population of mice is evenly divided into two groups, and each group is placed on an isolated island with no existing mouse population. Which statement best explains the difference in the mouse populations on the Island A and Island B at the end of 20 years?
On Island A, the allele for gray fur was dominant, while on Island B, the allele for brown fur was dominant
More brown mice were in the half of the original population that was sent to the Island B than in the group sent to Island A.
Conditions on Island B favored the brown-furred individuals, while both fur colors were evenly advantaged on Island A
The recapturing of mice on Island A and Island B was done differently
Organisms can be classified based on homology, which is shared characteristics inherited from a common ancestor. In the past, homologies were based on studies of anatomical structures and patterns of embryonic development. In more recent years, the use of molecular biology techniques has allowed homologies to be compared at the level of nucleotide sequences. Nucleotide sequence comparisons are possible because all organisms share which of the following?
DNA bases
Cellular organelles
Division of the nuclear chromosomes
Types of proteins needed for cellular functions
Genome maps provide the DNA sequences of chromosomes. Some scientists have compared the genome maps of a hedgehog and a sloth. What do these genome maps allow the scientists to determine?
The color patterns of the offspring of each species
How much the size ranges of the two species differ
The methods of protein synthesis that each species uses
How closely related the two species are to each other
Which of the following best characterizes natural selection?
Faced with an environment in which leaves grew only at the tops of short trees, giraffes responded by growing long necks.
Only giraffes with long necks moved into an environment where leaves grew only at the tops of short trees
The necks of giraffes that did not eat leaves from the tops of short trees grew shorter from lack of exercise
Among a population of giraffes, those with long necks were able to survive better in an environment in which leaves grew only at the top of short trees.
Two populations of mice living in the same forest are separated by a large water-filled ditch. After a rainstorm, flooding brings several mice from one population to the other population. When the mice from the first population reproduce with members of the second population, which of the following will likely occur?
All the offspring will die as a result of reproductive mutations
The offspring will be forced to leave the second population
The offspring will be genetically identical to their parent from the first population
The offspring in the second population will have greater genetic variety
The evolutionary theory proposed by Lamarck is considered an important step in scientific thought, even though it was eventually rejected. Which of the following best describes why Lamarck’s theory was rejected?
Characteristics acquired by a living organism cannot be passed to offspring.
There is no evidence that giraffe necks have gotten longer over time
It was not well documented and was never written down in a science paper
It was not as good a theory as Darwin’s, so people rejected its accuracy
Which of the following best describes the theory of punctuated equilibrium?
Biological change occurs slowly and steadily over a long period of time
Biological change occurs quickly over a short period of time and is followed by long periods of little or no change
Tiny changes in a species add up to major changes over time
Events throughout the history of life have caused the extinction of species
What term describes parts of organisms that have a similar structure but a different function?
Homologous Structures
Vestigial Structures
Embryological Structures
Analogous Structures
Homologous structures are defined as anatomical structures originating from the same structure in ancestral form.
For instance, a bird’s wing and the front flippers of a seal are examples of homologous structures. Which of the following does the presence of homologous structures in vertebrates suggest?
All vertebrates probably developed at the same rate
All vertebrates developed internally
All vertebrates have a common ancestor
All vertebrates evolved from different animals
An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown below, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Which statement is best supported by the information in this dendrogram?
Lesser pandas are more genetically similar to giant pandas than they are to raccoons
Brown bears are more genetically similar to giant pandas than they are to sun bears
Lesser pandas are more genetically similar to raccoons than they are to giant pandas
The bear species are all more genetically similar to dogs than they are to giant pandas
A species of jungle cats contains striped and spotted individuals. The spotted individuals are slightly better adapted to the shady forest. If there are no disruptive events, the evolutionary mechanism of natural selection will operate on the species. Over the course of two generations, the most likely result will be that -
there will be no striped individuals in the species
there will be more striped individuals in the species
there will be more spotted individuals in the species
there will be no spotted individuals in the species
Differences between the members of a population will most likely be passed on to future generations if they are -
not due to genetic changes and result in unfavorable variations
not due to genetic changes and result in favorable variations
due to genetic changes and result in favorable variations
due to genetic changes and result in unfavorable variations
According to the theory of natural selection, why are some individuals more likely than others to survive and reproduce?
Some individuals pass on to their offspring new characteristic they have acquired during their lifetimes.
Some individuals tend to produce fewer offspring than others in the same environment
Some individuals are better adapted to their environment than others
Some individuals do not pass on to their offspring new characteristics they have acquired during their lifetimes
A small town on the edge of the Caddo Lake National Wildlife Refuge was heavily infested with mosquitoes. The town was sprayed with an insecticide for a period of several months. The graph below shows the results of the daily counts of the mosquito population. Which of the following statements best explains why some mosquitoes survived after the first spraying?
Only the mosquitoes from the previous generation had a genetic mutation that made them resistant to the insecticide.
Some mosquitoes had a genetic mutation that made them resistant to the insecticide
All mosquitoes had a genetic mutation that made them resistant to the insecticide.
None of the mosquitoes had a genetic mutation that made them resistant to the insecticide.
The graph below represents the populations of two different species in an ecosystem over a period of several years. Which statement is a possible explanation for the changes shown?
Species B is better adapted to this environment
Species A is the predator of species B
Species B is a parasite that has benefited species A
Species A is better adapted to this environment
Which two organisms in the table to the right are most closely related?
A and B
B and C
C and A
not enough information is given to answer the question
Based on the phyologenic tree, which of these shows a correct ancestral lineage?
E is an ancestor to F and G
C is an ancestor to D and E
B is an ancestor to A
E is an ancestor to H and I
A cladogram is shown to the right. All the animals to the
right of the hagfish would have the common
characteristic of?
Fur
Claws or Nails
Lungs
Jaws
