Understanding Structures in Evolution

The video tutorial covers the seventh-grade evolution unit, starting with an introduction to geologic time and the law of superposition. It explains how scientists use comparative anatomy to study the body structures of different organisms to understand their evolutionary history. Key vocabulary such as evolution, anatomy, homologous, and analogous structures are introduced. The tutorial also provides instructions for an assignment involving comparison and contrast of anatomical structures, reading an article, and watching additional videos.

What does the law of superposition state about the age of rocks?

• The oldest rocks are on the top.

• The youngest rocks are on the bottom.

• The oldest rocks are on the bottom.

• All rocks are the same age.

What is the main idea of evolution?

• All living organisms evolved from a common ancestor.

• Evolution is a theory about the future.

• Evolution only applies to plants.

• Organisms do not change over time.

Which of the following is an example of homologous structures?

• Wings of bats and birds

• Fins of fish and wings of birds

• Legs of humans and wings of insects

• Flippers of whales and wings of bats

What is the function of homologous structures?

• They always serve the same function.

• They are not functional.

• They have different functions.

• They are used for decoration.

What is the key difference between homologous and analogous structures?

• Homologous structures have the same anatomy but different functions.

• Analogous structures have the same anatomy and function.

• Homologous structures have different anatomy but the same function.

• Analogous structures have the same anatomy but different functions.

Which of the following is an example of analogous structures?

• Wings of bats and birds

• Legs of humans and arms of monkeys

• Fins of fish and flippers of whales

• Roots of plants and stems of trees

What is the main function of analogous structures?

• They are used for camouflage.

• They serve different functions.

• They have the same function.

• They are not functional.

What should you do if you are completing the assignment on a phone?

• Use a computer instead.

• Click the top three dots and go to print layout.

• Print the document.

• Skip the assignment.

What is the purpose of comparing and contrasting body structures in the assignment?

• To memorize the anatomy of each organism.

• To learn about the history of organisms.

• To understand the function of each structure.

• To identify the oldest organism.

What should you do after watching the first two videos about evolution?

• Skip to the next lesson.

• Take a break.

• Write three things you are wondering.

• Watch the videos again.