CH 10: Representations of Life's History

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When did the first true plants with vascular systems to transport nutrients emerge?

Approximately 1.2 billion years ago

Around 600 million years ago

Approximately 525 million years ago

About 450 million years ago (correct)

What is the significance of the Cambrian Explosion in relation to vertebrates?

It marks the breakup of Pangea

It is when the first vertebrates appeared (correct)

It signals the development of algae

It marks the emergence of invertebrates

Which is NOT a division of the geological timescale?

Eras

Ages (correct)

Periods

Eons

How did continental drift impact the distribution and evolution of organisms?

It altered habitats and climate conditions Signup and view all the answers

What is the main feature that distinguishes eras from eons in the geological timescale?

Eras mark significant worldwide changes in flora and fauna Signup and view all the answers

During which geological event did invertebrates arise?

Cambrian Explosion Signup and view all the answers

What theory is supported by evidence from fossil records and studies of the Earth's crust?

Continental Drift Signup and view all the answers

What marked a period of rapid diversification known as the Cambrian Explosion?

Invertebrates arising Signup and view all the answers

Approximately when did the first life forms emerge on Earth?

3.5 billion years ago Signup and view all the answers

What type of organisms were the first life forms on Earth?

Simple single-celled organisms Signup and view all the answers

When did certain bacteria evolve the ability to perform photosynthesis?

3.5 billion years ago Signup and view all the answers

What are cells called that contain a nucleus and other organelles?

Eukaryotes Signup and view all the answers

When did more complex cells called eukaryotes evolve?

1.9 billion years ago Signup and view all the answers

When did the first multicellular organisms develop?

1.7 billion years ago Signup and view all the answers

What did the evolution of photosynthesis lead to?

The oxygenation of the atmosphere Signup and view all the answers

What marked a significant turning point in the evolution of Earth's atmosphere?

The evolution of photosynthesis Signup and view all the answers

Which type of cells contain a nucleus and compartmentalized organelles?

Eukaryotic cells Signup and view all the answers

What type of organisms were the first life forms to emerge around 3.5 billion years ago?

Archaea Signup and view all the answers

Around what time period did the first multicellular organisms develop?

1.7 billion years ago Signup and view all the answers

What pivotal process led to the oxygenation of Earth's atmosphere?

Evolution of photosynthesis Signup and view all the answers

Which event involved the development of more complex cells with a nucleus and organelles?

Rise of eukaryotes Signup and view all the answers

What was a key outcome of certain bacteria evolving the ability to perform photosynthesis?

Oxygenation of the atmosphere Signup and view all the answers

What was the primary characteristic of the first organisms to live in water?

Performance of photosynthesis Signup and view all the answers

What event led to the emergence of vertebrates?

Cambrian Explosion Signup and view all the answers

What is the largest unit of time on the geological timescale?

Eon Signup and view all the answers

What was the single landmass that broke apart due to continental drift?

Pangea Signup and view all the answers

What influenced the distribution and evolution of organisms according to the theory of continental drift?

Habitat alteration and climate conditions Signup and view all the answers

Approximately how many years ago did the first true plants with vascular systems emerge?

450 million years ago Signup and view all the answers

What is subdivided into eras on the geological timescale?

Eons Signup and view all the answers

What is a characteristic that distinguishes periods from eras on the geological timescale?

Type and distribution of flora and fauna Signup and view all the answers

When did the evolution of photosynthesis occur?

Approximately 3.5 billion years ago Signup and view all the answers

What was the main outcome of the rise of eukaryotes?

Formation of specialized tissues and organs Signup and view all the answers

When did the emergence of multicellular life occur?

Around 1.7 billion years ago Signup and view all the answers

What characterized the first life forms to emerge on Earth?

Simple single-celled organisms Signup and view all the answers

What is the significance of the evolution of photosynthesis?

Oxygenation of the atmosphere Signup and view all the answers

Which event led to the development of more complex cells containing a nucleus and organelles?

Rise of eukaryotes Signup and view all the answers

Approximately when did certain bacteria evolve the ability to perform photosynthesis?

Approximately 3.5 billion years ago Signup and view all the answers

What is the primary reason for the emergence of vertebrates and invertebrates during the Cambrian Explosion?

Competition for limited resources Signup and view all the answers

What is the main factor that influenced the distribution and evolution of organisms according to the theory of continental drift?

Alteration of habitats and climate conditions Signup and view all the answers

What is the characteristic that distinguishes eons from eras on the geological timescale?

Duration of time span Signup and view all the answers

What was the primary outcome of the breakup of the single landmass Pangea?

Distribution and evolution of organisms Signup and view all the answers

During which geological event did algae, the precursors to plants, emerge?

Approximately 1.2 billion years ago Signup and view all the answers

What is the primary reason for the subdivision of eras into periods on the geological timescale?

Distinct types of life existing at the time Signup and view all the answers

What is the significance of the emergence of invertebrates and vertebrates during the Cambrian Explosion?

Represents a period of rapid diversification of life Signup and view all the answers