Radiometric Dating and Evolution Concepts

The lecture explores how evolution can occur rapidly through mechanisms like exaptation and changes in developmental genes. It also discusses the evidence for Earth's age, emphasizing geologic time and dating methods. Radiometric dating is highlighted as a key technique for determining the age of Earth and its rock layers, supporting the theory of evolution as the best explanation for life's diversity.

What is exaptation in evolutionary biology?

• A trait evolving for a new function

• A trait disappearing over time

• A trait remaining unchanged

• A trait evolving for its original function

How can developmental genes influence evolution?

• By reducing genetic diversity

• By increasing mutation rates

• By altering gene expression patterns

• By changing the environment

What principle is used in relative dating to determine the age of rock layers?

• Principle of correlation

• Principle of radiometric decay

• Principle of superposition

• Principle of fossilization

Which method is commonly used for absolute age determination in geology?

• Tree ring analysis

• Ice core sampling

• Radiometric dating

• Sediment thickness measurement

What is the half-life of carbon-14 used in radiometric dating?

• 5,000,000 years

• 5,600 years

• 5,600,000 years

• 5,000 years

Why is carbon-14 not used to date very old rocks?

• It is not accurate

• It is too expensive

• It is not found in rocks

• It decays too quickly

What isotope is used to date rocks older than 100,000 years?

• Uranium

• Carbon-14

• Argon

• Potassium

Approximately how old is the Earth according to radiometric dating?

• 4.6 trillion years

• 4.6 million years

• 4.6 billion years

• 4.6 thousand years

When did multicellular life first appear on Earth?

• 2 billion years ago

• 1 billion years ago

• 3 billion years ago

• 4 billion years ago

What major event in Earth's history allowed for the diversification of life?

• The development of photosynthesis

• The extinction of dinosaurs

• The appearance of eukaryotic cells

• The formation of the moon