WorksheetsThe Cambrian Explosion
Total questions: 11
Worksheet time: 5mins
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
Theory 1: Species began to rapidly diversify due to increased nitrogen levels in the atmosphere
True
False
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
Theory 2: Species began to rapidly diversify due to some key evolutionary adaptation, such as vision
True
False
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.
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
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
The Amplectobelua symbrachiata ...
had decreased metabolic needs for swimming due to rapid growth of appendages
Never existed during the Cambrian period and was later discovered
Development of flat body allowed for a sedimentary lifestyle
