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WorksheetsSemester Test review - Evolution
Total questions: 16
Worksheet time: 11mins
The process of change over time is called:
natural selection
evolution
aging
radioactive decay
Why is variation important to survival of a species?
More variation means the population is more attractive.
More variation means less mutations.
More variation means more possible adaptations.
Trick question - variation ISN'T important to a species.
What factors must be present for natural selection and evolution to occur?
The trait must be inheritable
More offspring are produced than can survive, leading to competition
There must be variations within the population
Some traits give the organism an advantage and allow them to survive and reproduce more.
Define natural selection
This evidence of evolution links us to the past and shows how organisms have changed over very long periods of time.
Fossils
Homologous Structures
Embryology
Vestigial Structures
DNA/Amino acid comparisons
These are structures that are no longer used but show that an ancestor did.
Fossils
Homologous Structures
Embryology
Vestigial Structures
DNA/Amino acid comparisons
These are structures that have a similar underlying shape but now serve different functions - showing a common ancestor.
Fossils
Homologous Structures
Embryology
Vestigial Structures
DNA/Amino acid comparisons
All vertebrates go through a phase very early in development in which gill slits appear along the side of the neck. This suggests a common ancestor.
Fossils
Homologous Structures
Embryology
Vestigial Structures
DNA/Amino acid comparisons
The fewer differences that can be found in DNA base sequences, the more closely related two species are.
Fossils
Homologous Structures
Embryology
Vestigial Structures
DNA/Amino acid comparisons
Which 2 things cause genetic variation in a species?
Mutations
natural selection
evolution
Meiosis (crossing over and chromosome assortment)
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
a. What adaptations do the mice use to survive?
mutations
fur color to blend in
natural selection
echolocation
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
b. What caused the variation in fur color in the mice?
mutations
fur color to blend in
natural selection
radiation
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
c. How would you expect the population of mice to change over time on the lava field?
more dark mice, fewer light mice
all dark mice, no light mice
more light mice, fewer dark mice
all light mice, no dark mice
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
d. Which of Darwin's main points is shown in this example?
Descent with Modification
Homologous Structures
Natural Selection
Inheritance of Acquired Traits
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
e. If the mice gain a new predator that hunts by sound rather than sight, what happens to the selective advantage of fur color?
The advantage increases
it is no longer an advantage
It never was an advantage
The advantage remains the same.
Most rock pocket mice are typically light brown, living on desert sands. Occasionally, a darker colored mouse appears in the population.After a large volcanic eruption, some rock pocket mice found themselves living on the hardened lava flow.
f. What may become a new selecting agent for which mice will survive and reproduce with the predator that hunts by sound?
If they are light colored to blend into the environment
If they are dark colored to blend into the environment
If they have thicker toe pads and shorter nails to move quieter
If they have long nails to tap morse code messages to warn each other of danger
