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- 1. Multiple Choice
Turtles, alligators, and crocodiles are thought to be related to dinosaurs. What is the main source of evidence that scientists use to show this relationship and how these organisms may have changed over time?
Photographs of dinosaurs
Hair and skin samples
Direct observation
Fossil record
- 2. Multiple Choice
A scientist wants to develop a timeline of the prehistoric wooly mammoth to today’s elephant. How could the fossil record assist in their investigation?
It cannot help with their investigation.
It can demonstrate how the organisms changed over time.
It can demonstrate the structure of a modern-day elephant.
It can demonstrate similarities in muscle structure in both organisms.
- 3. Multiple Choice
In all animals with backbones, gills are present at some point during their development. What does this indicate about these organisms’ evolutionary histories?
They all start out their lives living in water.
They all lose their gills as they age and develop into adults.
They all share a common ancestor from millions of years ago.
They all evolved separately from each other over hundreds of years.
- 4. Multiple Choice
A student wanted to provide evidence that evolution had occurred in a snake species. Which pieces of evidence would support the investigation? Select all that apply.
Comparing the fossil record to today’s organisms
Modeling each organism’s habitat for differences
Comparing the diet of each organism
Comparing similar structures between organisms
- 5. Fill in the Blank
The fossil record provides evidence about _______ (prehistoric organisms and ecosystems, the rock cycle). Scientists have fossil specimens that show that nearly every species that evolved is extinct today.
- 6. Fill in the Blank
Of the quarter-million or so species found in the fossil record, the majority are ___2___ (similar to, different from) living species today. One of the drawbacks of fossils is that we cannot directly observe the organisms. This limitation means that scientists must usually infer how organisms behaved.
- 7. Multiple Choice
According to the diagram, which of the following statements is true?
Fossil A is oldest.
Fossil B is youngest.
Fossil C is younger than Fossil D.
Fossil C and D are the same age.
- 8. Multiple Choice
Fossils can tell us about Earth’s past. Which of the following statements are true? Select all that apply.
Fossils can only represent bones and shells of extinct animals.
Fossils give clues about environmental changes where the organism lived.
Fossils can give clues of changes in the organism’s body structure over time.
Fossils can be used to date the time period of rocks and rock layers when the organism lived.
- 9. Multiple Choice
Based on the fossil record, the ancestor of the whale was a land animal. This image shows the evolution of its body shape and limbs over time. The organism at the top of the image is the most ancient, and the organism at the bottom is the most modern. Which explanation best describes the change of the organism throughout time?
Based on the fossil record, the whale quickly adapted to its’ changing environment.
Based on the fossil record, the whale’s ancestor was forced to change its diet, because the climate became colder.
Based on the fossil record, the whale’s ancestor crossbred with an alligator, because alligators have superior hunting instincts and moved into the water.
Based on the fossil record, the whale’s ancestor gradually changed from limbs to flippers because of the changing environment including the increase in the volume of water.
- 10. Multiple Choice
The diagram shows the process of embryonic development of various organisms. A student was investigating the differences in the organisms’ patterns of growth at different stages of development. Which pattern is supported by the diagram?
The organisms look most similar just before birth.
All of the organisms have tails in stage 2 and stage 3.
All of the organisms have large heads at stage 2 and stage 3.
Differences among the organisms increase from stage 1 to stage 3.
- 11. Multiple Choice
Based on the diagram, which statement best summarizes embryonic development in vertebrates (animals with a backbone)?
Embryonic development follows a similar pattern in all vertebrate life forms.
There are no recognizable similarities among the developing embryos of vertebrates.
The features that distinguish each vertebrate species are visible in the earliest embryos.
Each vertebrate species follows a pattern of embryonic development unlike that of any other species.
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