Comparative Anatomy Presentation

Multiple Choice

Similarities in bone arrangements, like those in the picture, support the hypothesis that...

• these organisms are not well adapted

• these organisms share a common ancestor

• these organisms all share the same DNA sequences

• these organisms are members of the same species

Multiple Select

What is the purpose of comparative anatomy?

• To study the behavior of organisms

• To provide physical evidence for evolution

• To identify similarities and differences between organisms

• To analyze the genetic makeup of organisms

Fill in the Blanks

Many marine (water) animals have developed fins to help them swim, despite not having a recent common ancestor. This is an example of which type of structure?

Multiple Choice

Many different groups of organisms have wings, even though they do not share a recent common ancestor. This is because they evolved in environments with similar selective pressures. Wings are an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

Categorize

Options (8)

Characteristics inherited from a common ancestor.

Characteristics evolved independently and not from a common ancestor.

Divergent evolution

Convergent evolution

An example would be the shape of the for limb of a human and a cat.

An example would be the wings of a butterfly and the wings of a bat

Characteristics have different functions due to living in different environments.

Structures have similar functions because they live in similar environments.

Categorize the following:

homologous structures

analogous structures

Categorize

Options (6)

Similar structures but different functions

Divergent evolution

Similar functions but different structures

Convergent evolution

Sort the following as either Homologous or Analogous.

Homologous structures

Analogous Structures

Open Ended

Ostriches have wings, but do not fly. Humans have wisdom teeth, which many consider a vestigial organ. Discuss similarities and differences in the evolutionary significance of these features in ostriches and humans.

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident