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WorksheetsNatural Selection Amplify
Total questions: 15
Worksheet time: 15mins
Do organisms "decide" to evolve and change?
Yes, they know they need to change to survive
No, they change because of natural selection
What is a trait that makes it less likely that an individual will survive in a specific environment
A non-adaptive trait
A feature
A trait
An adaptive trait
What information can you gain from this histogram?
The population has high distribution
The population has low variation
The population has high variation
The population has no variation
What can you tell about this population of newts from the histogram
Most of the newts have high poison levels
Most of the newts have medium poison levels
Low poison level is the adaptive trait
You cannot tell anything about the poison levels
How can an individual be born with an adaptive trait?
The individual can choose to change to the adaptive trait when they want to.
The parents had genes for the adaptive trait, which they passed down to the individual.
The individual can choose to have the adaptive trait at birth.
The parents can choose for the offspring to have genes for the adaptive trait.
any difference between organisms of the same species
adaptation
camouflage
selective breeding
variation
Look at Diagram 1. How could you describe this newt population?
There are fifteen poison levels shown, and each individual has a different amount of poison.
There is one poison level shown, and all newts have the same amount of poison.
There are three poison levels shown, and no poison-level trait is more common than the others.
There are three poison levels shown, and one poison-level trait is the most common.
2. 3. Look at Diagram 2. Did SOME newts from all poison levels die? (Xs over the newts mean they died)
YES
NO
If this trend continued, which color ostrilopes would become LESS common in the population over time?
Blue
Yellow
How do you think the environment change between time 1 and time 2? How did the population change?
The environment became brown. Brown foxes are more likely to survive, so the white foxes changed to have brown fur.
The environment became brown. Brown foxes are more likely to survive, so both kinds of foxes passed on the gene for brown fur to their offspring.
The environment became brown. With each generation, more brown foxes survived long enough to pass on the gene for brown fur to their offspring.
Cactuses with longer spines are less likely to be eaten by sheep. If their environment changes to have many bighorn sheep, which of the following cactus populations will most likely survive?
Populations 1 and 2 will most likely survive.
Populations 2 and 3 will most likely survive.
Only Population 2 will survive because it is the only population with variation.
Blue jays with thinner beaks can easily reach and eat the seeds inside pinecones. If their environment changes to have only seeds in pinecones, which of the following blue jay populations will most likely survive?
Populations 1 and 2 will most likely survive.
Populations 2 and 3 will most likely survive.
Only Population 2 will survive because it is the only population with variation.
If this trend continued, which color ostrilope would become more common in the population over time?
Blue 1
Blue 4
Yellow 7
Yellow 10
How does natural selection amplify certain traits in a population over time?
By randomly changing traits in individuals
By increasing the frequency of beneficial traits
By eliminating all non-beneficial traits immediately
By allowing individuals to choose their traits
Which of the following best describes the role of natural selection in evolution?
Natural selection creates new traits in a population
Natural selection amplifies existing beneficial traits
Natural selection eliminates all genetic variation
Natural selection is unrelated to evolution
