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Worksheets8th Grade Unit 1 Review
Total questions: 23
Worksheet time: 22mins
What is evolution?
The loss of a species (a species dies out)
The predation of one species on another species
The change of traits in a species over time
The conversion of a carnivore (meat eater) into a herbivore (plant eater)
According to evolution, what happens to the frequency of traits in a population of species over time?
The frequency of traits randomly changes
The frequency of traits never changes
The frequency of advantageous traits increases over time
The frequency of advantageous traits decreases over time
Which statement below best describes the rate of evolution?
Evolution is always a slow process
Evolution is usually a slow process, but it can occur quickly as well
Evolution is usually a fast process, but it can occur slowly as well
Evolution is always a fast process
What is a common ancestor?
A selective pressure that led the formation all the species on Earth
An organism from which all organisms on Earth descended from
An organism which all organisms on Earth strive to become
An organism that lives on a different planet as well as Earth
Which of the following is NOT a postulate of Darwin’s Theory of Natural Selection?
There is little to no variation among the individuals in a species
Individuals compete with each other for resources
Competition can lead to death of individuals
Individuals who survive are more likely to reproduce and pass their traits to offspring
What is an adaptation?
A characteristic that an organism acquires during its life
A favorable trait, which helps an organism survive
An unfavorable trait, which is detrimental to the survival of an organism
A characteristic that makes an organism “less fit”
Which organisms are more likely to survive, reproduce and pass their traits to offspring?
Organisms that are well-adapted to the environment
Organisms that are not well-adapted to the environment
Organisms that are less fit
Organisms that reproduce very quickly
What is a source of variation in a sexually reproducing species?
Mutations
Recombination
Both mutations and recombination
Neither of these
Which of the following is a resource that organisms compete for?
Water
Space
Mates
All of the above
Why do organisms compete with each other for resources?
A. There is an unlimited supply of resources
B. There is a limited supply of resources
C. Organisms produce more offspring than can survive
Both b and c
Competition is important because:
It improves the success of a species as a whole
It makes an individual better adapted to the environment
It ensures that there are enough resources for everyone in an environment
It helps species reproduce
Fossils are an important piece of evidence for evolution because:
They show that organisms have changed over time on Earth
They demonstrate that organisms have become more complex
They suggest there are similarities between ancient organisms and present organisms, suggesting that all living things are somehow related
All of the above
Which structures do NOT imply evolutionary relationships?
Homologous structures
Analogous structures
Vestigial structures
All of the structures above imply evolutionary relationships
Which structure implies “loss of function” or evolutionary divergence from a species with a past function (that is no longer needed)?
Homologous structures
Analogous structures
Vestigial structures
All of the above
What can we learn about from fossils? What an organism looked light
What an organism looked like
How the organism moved around the environment
What the organism ate
All of the above
What piece of information does the fossil record NOT tell us?
It tells us about species that once lived but are now extinct
It tells us about species that have existed for a long period of time
It tells us about the emergence of species that have been on Earth for a short time
It tells us about species that are likely to emerge in the future
What is the strongest piece of evidence that supports evolution?
The fossil record
Embryology similarities
Genetic similarities
Anatomical similarities
Changes in the sequence of nucleotides in a gene can cause:
The gene to be transformed (thus altering a trait)
The gene to be turned off (thus a trait is no longer expressed)
A new to be created (thus causing the expression of a new trait)
All of the above
According to the phylogenetic tree, which species is most similar to species E?
A
B
C
D
According to the phylogenetic tree, which node is the most recent common ancestor to A and C?
1
2
3
4
According to the phylogenetic tree, which organism has existed for the longest period of time?
A
B
C
D
Which of the following is NOT an example of artificial selection?
Antibiotic resistant bacteria
Seedless fruit
Domesticated animals
Breeding cows with high milk output
Survival of the fittest is:
Organisms that exercise and diet will best survive
Organisms with advantageous ("better") traits are more likely to survive.
Organisms that can run the fastest will survive
Organisms unable to complete for resources will survive
