Homology and Evolutionary Evidence

The video by Mr. Vev explores various evidences supporting the theory of evolution and common ancestry among species. It covers the fossil record, showing how organisms have changed over time, and biogeography, which explains species distribution due to continental drift. The video also discusses homologies, including molecular, anatomical, and developmental, highlighting similarities in DNA, body structures, and embryonic development as evidence of shared ancestry.

What does the fossil record primarily show about organisms?

• They have always remained the same.

• They are all unrelated.

• They have changed over time.

• They have no common ancestors.

How does biogeography provide evidence for evolution?

• By showing that all species are found everywhere.

• By demonstrating that species are randomly distributed.

• By illustrating how species spread and adapt to different environments.

• By proving that species never change.

What is a key feature of molecular homologies?

• All living things have different types of DNA.

• All living things share the same types of molecules necessary for life.

• Only mammals have RNA.

• Proteins are unique to each species.

What does a high percentage of shared amino acids between two species indicate?

• They evolved in the same environment.

• They are completely unrelated.

• They share a more recent common ancestor.

• They have no common ancestor.

Which of the following best describes the concept of homology?

• Different species have completely different structures.

• Species have similar structures due to a common ancestor.

• Species never share any anatomical features.

• All species have identical DNA.

Which of the following is an example of a homologous structure?

• Wings of a butterfly and a bat.

• Human arm and dolphin's flipper.

• Tail of a fish and a human.

• Beak of a bird and a turtle's shell.

What are vestigial structures?

• Structures that are unique to each species.

• Structures that are remnants of an ancestor and have no current function.

• Structures that are fully developed and functional.

• Structures that have a new function.

Which of the following is NOT a vestigial structure in humans?

• Heart

• Appendix

• Wisdom teeth

• Tailbone

Which of the following is true about analogous structures?

• They have different structures but the same function.

• They are always found in mammals.

• They are identical in all species.

• They have the same structure but different functions.

What do developmental homologies suggest about different organisms?

• They develop in completely different ways.

• They have no common ancestors.

• They develop in similar ways, indicating a common ancestry.

• They only share similarities in adulthood.