Unit 7 Vocabulary Chapter 25

What is adaptive radiation?

• A process where organisms diversify rapidly into new forms

• A method of calculating the age of rocks

• A type of gene regulating anatomical structures

• A rapid burst of evolution 540 million years ago

What is an alkaline vent?

• A type of gene regulating anatomical structures

• Deep ocean environments with chemical conditions for early life

• A rapid burst of evolution 540 million years ago

• A self-organized collection of lipids

What triggered the Cambrian explosion?

• A decrease in ocean temperatures

• A small increase in oxygen levels

• The formation of Pangaea

• The development of homeotic genes

What does endosymbiosis describe?

• The time required for a substance to reduce to half

• Two organisms living together, one inside the other

• The movement of tectonic plates

• The diversification of organisms into new forms

What is half-life?

• The time required for a quantity to reduce to half its initial value

• A rapid burst of evolution 540 million years ago

• A process where organisms diversify rapidly

• A supercontinent that incorporated almost all landmasses

What is heterochrony?

• A change in developmental timing

• A type of vent found in the ocean

• A self-organized collection of lipids

• The scientific theory explaining tectonic movement

What do homeotic genes regulate?

• The diversification of organisms into new forms

• The development of anatomical structures

• The time required for a substance to reduce to half

• The movement of tectonic plates

What is a hydrothermal vent?

• A type of gene regulating anatomical structures

• Naturally forming structures found in the ocean

• A rapid burst of evolution 540 million years ago

• A self-organized collection of lipids

What is macroevolution?

• Evolution above the level of species

• A rapid burst of evolution 540 million years ago

• A process where organisms diversify rapidly

• The time required for a substance to reduce to half

What is a mass extinction?

• A short period of geological time with high biodiversity loss

• A rapid burst of evolution 540 million years ago

• A process where organisms diversify rapidly

• The time required for a substance to reduce to half