Exploring Anatomical Evidence in Evolution

The video explains the concept of evolution, highlighting how genetic changes over time lead to species diversity. It discusses how scientists determine evolutionary relationships through methods like fossil records, DNA analysis, and anatomical comparisons. The video introduces homologous features, which indicate a common ancestor, and contrasts them with analogous features, which evolve independently. Examples include the bone structures in various animals and the wings of birds and butterflies.

Approximately how long ago did single-celled organisms first appear on Earth?

• 3.5 billion years ago

• 1 billion years ago

• 500 million years ago

• 4.5 billion years ago

Which method is NOT used by scientists to find evidence of evolution?

• Examining the fossil record

• Analyzing computer simulations

• Analyzing DNA

• Comparing embryonic development

How do scientists use the fossil record to study evolution?

• By measuring the age of fossils only

• By studying the color of fossils

• By comparing fossils to modern organisms

• By creating digital models of fossils

What type of features indicate a common ancestor between species?

• Digital features

• Analogous features

• Symmetrical features

• Homologous features

Which animals share a similar bone structure to humans?

• Fish, reptiles, birds

• Birds, dogs, whales

• Amphibians, fish, insects

• Insects, birds, bats

What does it mean if two species have many homologous features?

• They do not share any common ancestor

• They share a recent common ancestor

• They are distantly related

• They are not related

What can you infer about species with fewer homologous features?

• They have no evolutionary relationship

• They are less closely related

• They share a more recent common ancestor

• They are more closely related

Which features evolved independently in birds and butterflies?

• Beaks

• Wings

• Legs

• Feathers

What is the main difference between homologous and analogous features?

• Analogous features indicate a common ancestor, homologous do not

• Homologous features are inherited from a common ancestor, analogous are not

• Analogous features are structurally similar, homologous are not

• Homologous features perform the same function, analogous do not

Which of the following is an example of an analogous feature?

• Human arm and bird wing

• Bird wing and butterfly wing

• Whale fin and human hand

• Cat limb and dog limb