LS4A - Evidence of Common Ancestry and Diversity

Paul Anderson discusses the evidence of common ancestry and diversity, focusing on Darwin's theory of common descent. He highlights the unity and diversity of life, using fossil and molecular evidence to support evolutionary relationships. The video also covers evolutionary development, including Hox genes, and provides a teaching progression for different educational levels.

What was one major limitation Darwin faced when proposing his theory of common descent?

• Limited knowledge of animal behavior

• No support from other scientists

• Absence of molecular evidence

• Lack of fossil evidence

Which of the following is an example of fossil evidence supporting common ancestry?

• Similarities in DNA sequences

• Presence of Hox genes

• Similar bone structures in different species

• Differences in animal behavior

How much DNA difference is there between humans and chimpanzees?

• 1.2%

• 2.5%

• 6.6%

• 5.0%

What role do Hox genes play in evolutionary development?

• They control the speed of growth

• They dictate where body parts are placed

• They determine the color of an organism

• They influence dietary habits

In lower elementary grades, what concept should students understand about extinct species?

• They can look similar to living species

• They have no relation to current species

• They are completely different from living species

• They are more advanced than current species

What is the significance of sedimentary rocks in understanding Earth's history?

• They provide layers that document Earth's history

• They are the oldest type of rocks

• They are formed by volcanic activity

• They contain no fossils

Which of the following is NOT a method used to construct the phylogenetic tree?

• Behavioral studies

• DNA analysis

• Amino acid structure comparison

• Embryology