SCIENCE - NATURAL SELECTION EXAM QUESTIONS AND
VERIFIED CORRECT ANSWERS GRADED A+
Cause
An event or process that leads to a result or change.
Effect
A result or change that happens because of an event or process.
Feature
A characteristic that all members of a species have.
Camouflage
A way of hiding by looking the same as the background.
Ancestor
A related organism from a previous generation.
Trait
A specific characteristic of an individual organism.
Adaptive Trait
A trait that makes it more likely that an individual will survive in a specific environment.
Non-Adaptive Trait
A trait that makes it less likely that an individual will survive in a specific environment.
Variation
Any difference in traits between individual organisms.
Population
,A group of the same type of organism living in the same area.
Environment
Everything (living and nonliving) that surrounds an organism.
Generation
A group of individuals born and living at about the same time.
Distribution
The number of individuals with each trait in a population.
Histogram
A graph that uses bars to show how characteristics or values are distributed within a
group.
Mutation
A random change to a gene that sometimes results in a new trait.
Gene
An instruction for making a protein molecule.
How can histograms help us describe a population?
Histograms can help us describe a population by the number of bars seen telling us a
population's variation and the bar height telling us the distribution of each trait.
Remember this:
A population can be described by the traits present and by the number of individuals
who have each trait.
How can we describe this population?: 10 low fur ostrilopes, 30 medium fur
ostrilopes, and 50 high fur ostrilopes.
, We can describe this ostrilope population by saying that most ostrilopes are high in fur,
but there is some variation with less medium fur and low fur ostrilopes.
Remember:
The number of individuals with each trait in a population can change over time.
What are two ways the number of individuals with each trait in a population can
change?
One way is by environmental change: the population members with the adaptive trait
will become more common over time, while ones with the non-adaptive trait will become
less common. Another way is by two organisms having a baby which has a mutation in
its genes for a different trait.
Over many generations, it is seen that the newt population in a park seemingly
increased in poison traits. This means the newts became much more poisonous
over time. What could be the cause to this?
The cause to this could've been that a baby with a mutation in its genes for a higher
level poison trait could've been born. Over time, higher poison level traits became more
common over time as they were adaptive traits, making high poison newts more
common.
How can a sudden change in in Earth's climate impact an animal species?
A sudden environmental change, like hotter weather can quickly kill out organisms of
populations. Sometimes, organisms would die out to quickly to adapt to the new
environment, causing extinctions.
VERIFIED CORRECT ANSWERS GRADED A+
Cause
An event or process that leads to a result or change.
Effect
A result or change that happens because of an event or process.
Feature
A characteristic that all members of a species have.
Camouflage
A way of hiding by looking the same as the background.
Ancestor
A related organism from a previous generation.
Trait
A specific characteristic of an individual organism.
Adaptive Trait
A trait that makes it more likely that an individual will survive in a specific environment.
Non-Adaptive Trait
A trait that makes it less likely that an individual will survive in a specific environment.
Variation
Any difference in traits between individual organisms.
Population
,A group of the same type of organism living in the same area.
Environment
Everything (living and nonliving) that surrounds an organism.
Generation
A group of individuals born and living at about the same time.
Distribution
The number of individuals with each trait in a population.
Histogram
A graph that uses bars to show how characteristics or values are distributed within a
group.
Mutation
A random change to a gene that sometimes results in a new trait.
Gene
An instruction for making a protein molecule.
How can histograms help us describe a population?
Histograms can help us describe a population by the number of bars seen telling us a
population's variation and the bar height telling us the distribution of each trait.
Remember this:
A population can be described by the traits present and by the number of individuals
who have each trait.
How can we describe this population?: 10 low fur ostrilopes, 30 medium fur
ostrilopes, and 50 high fur ostrilopes.
, We can describe this ostrilope population by saying that most ostrilopes are high in fur,
but there is some variation with less medium fur and low fur ostrilopes.
Remember:
The number of individuals with each trait in a population can change over time.
What are two ways the number of individuals with each trait in a population can
change?
One way is by environmental change: the population members with the adaptive trait
will become more common over time, while ones with the non-adaptive trait will become
less common. Another way is by two organisms having a baby which has a mutation in
its genes for a different trait.
Over many generations, it is seen that the newt population in a park seemingly
increased in poison traits. This means the newts became much more poisonous
over time. What could be the cause to this?
The cause to this could've been that a baby with a mutation in its genes for a higher
level poison trait could've been born. Over time, higher poison level traits became more
common over time as they were adaptive traits, making high poison newts more
common.
How can a sudden change in in Earth's climate impact an animal species?
A sudden environmental change, like hotter weather can quickly kill out organisms of
populations. Sometimes, organisms would die out to quickly to adapt to the new
environment, causing extinctions.
