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WorksheetsEvolutionary History CMS
Total questions: 20
Worksheet time: 12mins
Which species (H, I, or K) is the closest relative to Species J?
Species H
Species I
Species K
Neither
The body structures for a population of chimpanzees were stable for a long time. Then, their body structures changed, making the chimpanzees stronger. Why did this happen?
Organisms naturally become stronger over time.
It is impossible to say without more information.
The chimpanzee population wanted to be stronger.
Their environment must have changed.
Do you think the two species have a common ancestor?
NO
YES
an older population from which two or more newer species descended
descendant species
paleontologist
common ancestor population
shared structure
Imagine a population of frogs that live in the forest. The frogs have a green coloring on top that helps them blend into the forest so they are not noticed by predators.
Imagine that half of this population stayed in the forest and the other half of the population moved to the hills above the forest, which are drier, with some brown grass and brown soil.
Which population of frogs is likely to have more changes after many generations?
Descendant Species 1: The frogs in the brown hills.
Descendant Species 2: The frogs in the green forest.
Neither.
the process by which one population evolves into two or more different species
paleontologist
speciation
descendant species
species
What is a related organism from a previous generation?
an adaptive trait
an ancestor
a descendant
a generation
What is the process by which species adapt to environmental changes over a very long time ?
evolution
a common ancestor population
speciation
a generation
Why is Environment important to evolution?
It is where animals choose to live
It causes mutations
It decides which traits can survive and make babies
It makes mutations happen more often
Shared Structures always come from
random chance
two different species in a similar environment
a common ancestor
species structures are entirely unique.
Every time there is a branch in an evolutionary tree, it means,
The environment changed and a new species formed
two new species were left over as the first suddenly went extinct
Animals on different branches must live in different time periods
The locations where you can find the species is spreading.
Select all examples of a Body Structure:
Skull
Arm
Leg
Heart
What structure did the common ancestor have?
Scapula bone in shoulder
Three bones in inside ear
Two bones in inside ear
Five toes in each back limb
Which of these animals are the most closely related?
The Desert Cottontail and The Grizzly Bear, because they are both mammals and give milk to their babies
The Sea Otter and the Desert Cottontail, because they are both much smaller than the bear
The Grizzly Bear and the Sea Otter, because they both share a backbone and canine teeth
All three animals are equally related
Which Traits did the Common Ancestor have? select all that apply
Tibia Bone
Lays eggs
scale
fur
Which of these animals are more closely related?
The turtle and the Siamang because they both give live birth
The Flamingo and the Siamang, because they fur and feathers are more similar that feathers and scales
The flamingo and the turtle, because they both have a tibia bone and lay eggs
All three animals are equally related
Evolution is
a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group
the process of turning into a human
the process by which species adapt to environmental changes over a very long time
the process by which one population evolves into two or more different species
Which of these numbers is closest to the age of the earth?
4,600 years
460,000 years
46 million years
4.6 billion years
Which is the best description of evolution?
When organisms change for no clear reason
When organisms change into new organisms
When organisms change over time to adapt to their environments
When organisms don't change over time
A fossil is
living things, such as plants, animals, and bacteria
an organism’s arm, leg, or wing
evidence of life from the past, such as fossilized bones, footprints, or leaf prints
everything (living and nonliving) that surrounds an organism
