The Cambrian Explosion

Adaptive Radiation means?

• diverse forms of life rapidly evolved to fill ecological niches

• species evolve to become identical to one another

• driven solely by random genetic mutations without any influence from environmental factors

• a process that leads to the extinction of species rather than their proliferation

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Theory 1: Species began to rapidly diversify due to increased nitrogen levels in the atmosphere

• True

• False

Tags

NGSS.HS-LS4-5

How are Iron Redox Proxies Used?

• Primarily utilized to measure the temperature variations in ancient environments.

• Used to determine the age of sedimentary rocks in geological formations.

• Help estimate the levels of anoxic and ferruginous compounds during ancient environments

• Used to assess the acidity levels of soil in agricultural fields.

What did Researchers Infer from Cambrian Eye Fossils?

• Concluded that Cambrian eye fossils indicate the absence of vision in ancient marine organisms

• believed that vision evolved much later in evolutionary history than previously thought.

• ancient organisms primarily relied on other senses, such as touch or smell, for survival, rather than vision

• Cambrian eye fossils were used for predation in nature and could see in low light environments

Tags

NGSS.HS-LS4-4

Theory 2: Species began to rapidly diversify due to some key evolutionary adaptation, such as vision

• True

• False

Tags

NGSS.HS-LS4-4

What was an evolutionary innovation found in the Cambrian Period

• evolution of complex vertebrate brains.

• development of wings in various terrestrial organisms

• development of hard shells and complex body plans

• emergence of advanced mammalian species.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

From research done on Iron Proxies, they concluded that increasing oxygen levels during late-Proterozoic had no relevance to Cambrian oxygen levels.

• False

• True

What is the name of the supercontinent that split

• Rambinia

• Rodinia

• Pangea

• Russia

Tags

NGSS.HS-ESS1-5

What is the most abundant type of evidence for the Cambrian explosion

• Ancient DNA Samples

• Fossilized organisms

• DNA Sequencing

Fossil records show compound eye development during the Proterozoic period?

• False

• True

Tags

NGSS.MS-LS4-1