Biology HN- Evolution- Day 5

What are the four main types of evidence for evolution?

Embryology, Fossil Evidence, Biochemistry, Anatomy

How can comparative embryology show common ancestry?

By comparing embryos of different species, which look similar in early stages due to a common ancestor.

What does fossil evidence provide in terms of evolution?

A record of ancient species that can be compared to current species, showing changes in structures.

What is relative age in the context of fossils?

Determining the age of a fossil based on its position compared to other fossils.

What is absolute age in fossil dating?

Using radioactive isotopes to determine the exact age of a fossil based on the decay of elements.

What does comparative biochemistry involve?

Comparing biomolecules (DNA or amino acids) of different species to determine evolutionary relationships.

What are homologous structures?

Structures that are similar due to common ancestry, resulting from divergent evolution.

What is divergent evolution?

When species share a common ancestor but evolve into different species.

What are vestigial structures?

Structures that are no longer used by an organism, providing evidence for evolutionary change.

Give an example of a vestigial structure.

Snakes have vestigial leg bones.

What are analogous structures?

Structures that are similar due to similar environments, not because of a common ancestor.

What is convergent evolution?

When organisms evolve similar traits due to similar environments, not due to a common ancestor.

How do fossils show the evolution of horses?

Fossils demonstrate how horses evolved from smaller ancestors.

Which modern animals are dinosaurs most closely related to?

Birds, not reptiles.

What is the significance of anatomical evidence in evolution?

It uses physical structures of animals to determine evolutionary relationships.

What does the term 'anatomical record' refer to?

The collection of physical structures used to study evolutionary relationships.

What is the role of radioactive isotopes in determining fossil age?

They decay over time, allowing scientists to calculate the age of fossils.

What does it mean when two species have similar biomolecules?

The more similar the molecules, the more closely related the organisms are.

What is the primary focus of the 'Speciation Mad Libs' activity?

To explore concepts related to speciation and evolution.

What is the main objective of the lesson on evidence for evolution?

To evaluate various forms of evidence that support the theory of evolution.