AP Biology Chapter 25

Front

What organelles definitely arose from endosymbiosis?

Back

Chloroplast and Mitochondria

Front

What does the fossil record indicate about the age of fossils in different rock layers?

Back

Fossil D is older than fossil C.

Front

What does a hypothesis represent in scientific research?

Back

The research question.

Front

What gases were present on early Earth?

Back

NH3, CH4, H2O, and H2.

Front

What was the focus of the Miller-Urey experiment?

Back

Water, inorganic molecules, and energy.

Front

Define endosymbiosis.

Back

A theory that explains the origin of mitochondria and chloroplasts as a result of a symbiotic relationship between different species.

Front

What is the significance of the fossil record in understanding evolution?

Back

It provides evidence of the chronological order of species and their changes over time.

Front

What is the role of energy in the formation of organic molecules?

Back

Energy is required to drive chemical reactions that synthesize organic molecules from inorganic precursors.

Front

What is the difference between a hypothesis and a theory?

Back

A hypothesis is a testable prediction, while a theory is a well-substantiated explanation based on a body of evidence.

Front

What are the primary components of the primordial soup hypothesis?

Back

Water, organic molecules, and energy sources.