Exploring Evidence of Evolution

The video tutorial discusses five lines of evidence for evolution: fossil records, convergent evolution, divergent evolution, conserved early development, and molecular biology. Fossil records show gradual changes over time, while convergent evolution explains how different species develop similar traits due to similar selective pressures. Divergent evolution highlights how species with a common ancestor evolve differently, leading to homologous structures. Conserved early development shows how embryonic similarities indicate common ancestry. Molecular biology provides evidence through DNA similarities, suggesting common ancestry among species.

What type of rock are fossils most likely to be found in?

• Sedimentary rock

• Metamorphic rock

• Basalt rock

• Igneous rock

What does the presence of iridium in geological layers suggest?

• Glacial movement

• Volcanic activity

• Meteor strike

• Earthquake

Which animals are an example of convergent evolution?

• Elephant and rhinoceros

• Whale and shark

• Cat and dog

• Tasmanian wolf and gray wolf

What is a common feature of animals that have adapted to similar niches?

• Similar physical traits

• Same lifespan

• Identical diets

• Identical genetic makeup

What are homologous structures an indication of?

• Same habitat

• Common ancestry

• Similar diets

• Identical behavior

Which structures develop from the same embryonic tissues?

• None of the above

• Symmetrical structures

• Analogous structures

• Homologous structures

What does conserved embryonic development indicate?

• Rapid mutation rates

• Shared ancestry

• No evolutionary change

• Different species

Which gene's similarity suggests a closer common ancestor between humans and pigs?

• Ribosomal RNA

• Cytochrome oxidase

• Insulin

• Hemoglobin

What percentage difference in the cytochrome oxidase gene exists between humans and ducks?

• 17%

• 13%

• 50%

• 66%

What does a significant difference in DNA sequences between species suggest about their evolutionary relationship?

• More distant common ancestor

• Closer common ancestor

• No common ancestor

• Recent hybridization