Living Fossils' Aren't Really a Thing

The video discusses the concept of living fossils, species that appear unchanged over millions of years. It challenges the notion that these organisms haven't evolved, highlighting examples like crocodilians and tuatara. The video explains that while some species may look similar to their ancient ancestors, they have undergone significant genetic changes. It emphasizes that evolution is a constant process, even if changes are not always visible.

What is the main reason Charles Darwin used the term 'living fossil'?

• To describe species that have not evolved at all

• To highlight species with no evolutionary need to change

• To refer to species that are extinct

• To categorize species that are rapidly evolving

Which of the following is a misconception about 'living fossils'?

• They have remained unchanged for millions of years

• They are examples of evolutionary stasis

• They are found in the fossil record

• They are not subject to evolutionary pressures

Which species is used as an example of a 'living fossil' that has undergone significant genetic change?

• Crocodiles

• Tuatara

• Horseshoe crabs

• Ginkgo trees

What evidence is used to show that tuatara are evolving?

• Their unchanged physical appearance

• Their habitat in New Zealand

• Mitochondrial DNA studies

• Fossil records showing no change

How did crocodilians differ in the Late Jurassic compared to today?

• They were smaller in size

• They were primarily land-dwelling

• They had no body armor and lived in the sea

• They were herbivores