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WorksheetsLife Science Review
Total questions: 51
Worksheet time: 22mins
What is the history of life documented by fossils?
Fossil Record
Geological Time Scale
Index Fossil
Plate Tectonic Theory
The oldest fossils are found on the ______ layer, while the youngest fossils are found on the ______ layer.
bottom, bottom
bottom, top
top, bottom
top, top
Which of the following CAN'T the fossil record prove about a species?
Its evolution
Its existence
Its diversity
Its extinction
Its color
How do you determine how diverse a time period was?
Count the number of different fossils in different layers.
Count the number of different fossils in the same layer.
Count the number of identical fossils in different layers.
Count the number of identical fossils in identical layers.
Which layer would be the most diverse?
A layer with 5 identical fossils.
A layer with 8 different fossils.
A layer with 10 identical fossils.
A layer with 2 different fossils.
Comparing how the anatomy of the fossil has changed over time BEST shows how the species has
existed.
adapted.
evolved.
died.
When a species no longer exists in the upper layers, what can scientists conclude?
That it is hiding.
That it evolved into a new species.
That it went extinct.
That it never really existed.
If the fossil layer contains fossils with shells and fins, then the environment was probably ______. If the fossil layer contains fossils with legs and wings, then the environment was probably _____.
aquatic; aquatic
aquatic; terrestrial
terrestrial; aquatic
terrestrial; terrestrial
When do populations either adapt or go extinct?
Always
Anytime the environment significantly changes
Never
At random times
What is it called when more than 50% of populations living in an area die?
A tragedy.
A mass extinction event.
A catastrophe.
A global warming event.
What are the two biggest geographic causes of rapid mass extinction events?
Earthquakes
Volcanic Eruptions
Asteroid Impacts
Hurricanes
How do volcanoes and asteroids cause mass extinctions?
They cause more than 50% of species to burn to death.
They cause giant cracks in the ground which the species fall through.
They put dust and ash into the atmosphere, blocking the sunlight.
They trigger a series of earthquakes and tsunamis which destroy the earth.
What are two causes of gradual geographic changes which can lead to mass extinction events?
Climate Change
Volcanoes
Asteroids Impacts
Tectonic Plate Movement
How many major mass extinction events in history?
1
5
10
15
What percentage of all life on Earth went extinct during the largest mass extinction event?
50%
75%
96%
100%
What happens to the surviving populations after a mass extinction event?
They also die.
They adapt to the new environment.
They continue to exist with no structural changes.
They become a whole new species.
What is the term for all the same members of a species living in the same area?
Ecosystem
Population
Environment
Community
What is the term for the physical appearance of an organisms genes?
Genotype
Phenotype
Molecular DNA
Embryology
When does variation within a population occur?
When they have identical phenotypes.
When they have identical genotypes.
When they have different phenotypes.
When they asexually reproduce.
True or False: Adaptations help an organism survive in its environment.
True
False
Why is variation useful to a population?
If the environment stays the same, then all the members of a population will die.
If the environment changes, then all the members of a population will survive.
If the environment changes, then all of the members of a population will die.
If the environment changes, then some of the members of the population will survive.
What determines which phenotype is the best?
The environment.
The parents.
It is completely random.
The phenotype of an organism does not really impact its ability to survive.
What is the process of environmental changes causing a species to gradually change over time?
Artificial Selection
Selective Breeding
Genetic Engineering
Natural Selection
Green tree frogs and gray tree frogs exist in a swamp. Green tree frogs blend in with the plants and gray tree frogs blend in with the mud and logs. The swamp experiences a drought and the green plants die. What is the population?
Swamp
Gray and Green Tree Frogs
Mud and Logs
Drought
Green tree frogs and gray tree frogs exist in a swamp. Green tree frogs blend in with the plants and gray tree frogs blend in with the mud and logs. Is the population varied?
Yes
No
Green tree frogs and gray tree frogs exist in a swamp. Green tree frogs blend in with the plants and gray tree frogs blend in with the mud and logs. The swamp experiences a drought and the green plants die. What is the selecting agent?
Skin Color
Mud
Plants
Drought
Green tree frogs and gray tree frogs exist in a swamp. Green tree frogs blend in with the plants and gray tree frogs blend in with the mud and logs. The swamp experiences a drought and the green plants die. How will the population change?
Green tree frogs will increase.
Gray tree frogs will increase.
Both green and gray tree frogs will increase.
The population will not change.
In artificial selection, what is the selecting agent?
The environment
Predators
Humans
It's Random
What is the choosing of two parents to mate to produce desired offspring?
Selective Breeding
Cloning
Genetic Engineering
Natural Selection
How does selective breeding usually impact the genetic diversity of a population?
Increases Diversity
Decreases Diversity
It Doesn't Usually Affect Diversity
What is the breeding of two parents for the same trait?
Genetic Engineering
Cloning
Hybridization
Inbreeding
What is the breeding of two parents for different traits?
Genetic Engineering
Cloning
Hybridization
Inbreeding
What is asexual reproduction that produces offspring that are genetically identical to the parent?
Inbreeding
Cloning
Hybridization
Genetic Engineering
What is it when the DNA sequence of an organism is manipulated, often by inserting the DNA of a different organism into the original strand?
Genetic Engineering
Cloning
Inbreeding
Hybridization
What type of artificial selection is it when a farmer crosses a type of pea plant that produces many pods with a type of pea plant that is resistant to disease?
Cloning
Genetic Engineering
Hybridization
Inbreeding
What type of artificial selection is it when two parents with similar genes are used to produce a desired trait but may also result in a higher risk of genetic defects?
Cloning
Hybridization
Inbreeding
Genetic Engineering
What is the term for species that are still alive today?
Biotic
Extant
Extinct
Asexual
The more similar two species are,
the less closely related they are.
the greater the risk of death.
the more closely related they are.
the greater chance their DNA sequence is different.
True or False: Species that are closely related descended with modifications from a common ancestor.
True
False
What are four sources of evidence for common ancestry?
DNA (Molecular)
Homologous Structures
Anatomical Differences
Embryology
Fossil Record
What are homologous structures?
Structures with the same anatomy and the same function.
Structures with the same anatomy and different functions.
Structures with different anatomy and the same function.
Structures with different anatomy and different functions.
Bats wings and dolphins fins are similar in structure but differ in function. What does this imply?
The have a common ancestor.
They evolved randomly.
They are unrelated.
They both use their wings and fins for the same function.
What is an embryo?
The earliest stages of developing life forms.
The adult form a life.
The adolescent form of life.
The baby form of life.
How can embryos prove common ancestry?
The more similar they are, the more closely related they are.
The less similar they are, the more closely related they are.
The more similar they are, the less closely related they are.
The similar embryos are completely random.
How can DNA prove relatedness?
The less similar the DNA sequence, the less related they are.
The less similar the DNA sequence, the more related they are.
The more similar the DNA sequence, the less related they are.
Comparing DNA sequences cannot show relatedness.
What is the difference between a prokaryote and a eukaryote?
Only prokaryotes have a nucleus.
Only eukaryotes have a nucleus.
Only prokaryotes are single-celled.
Only eukaryotes are single-celled.
Moist, permeable skin, can live on land and water.
Fish
Reptiles
Amphibians
Birds
Mammals
Wings, Beaks, Feathers, Lay Eggs
Fish
Amphibians
Reptiles
Mammals
Birds
Dry, scaly skin, lays eggs, lives on land
Fish
Birds
Reptiles
Amphibians
Mammals
Aquatic, Fins, Lays Eggs, Gills
Fish
Birds
Amphibians
Reptiles
Mammals
Fur or hair, live birth, mammary glands
Fish
Birds
Reptiles
Amphibians
Mammals
