History of Life on Earth

Which of the following best describes the first organisms on Earth?

• photosynthetic

• eukaryotic

• multicellular

• prokaryotic

Order the following based on when the event occurred in Earth's history.

• Oxygen accumulation in atmosphere

• First life on Earth

• Evolution of modern humans

• First plants evolved

• K-T Extinction killed off most dinosaur species

The Earth is (a)   billion years old.

Choose all of the following that describe early Earth conditions (over 3 billion years ago).

• intense storms

• oxygen-rich atmosphere

• asteroid bombardment

• high biodiversity

• presence of organic molecules

Which of the following was probably not present in the atmosphere of the primitive Earth? 

• Methane
• Oxygen
• Water
• Carbon dioxide

One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. According to this theory, which of the following events would need to occur first for life to evolve?

• onset of photosynthesis

• origin of genetic material

• Synthesis of organic molecules

• formation of the plasma membrane

When did life on Earth begin?

• 4.6 to 4.0 billion years ago
• 3.9 to 3.5 billion years ago
• 4.6 to 4.0 million years ago
• 3.9 to 3.5 thousand years ago

Which of the following is true about mass extinction events?

• They happen rapidly (less than 100 years)

• They cause die off of all organisms

• They are marked by significant changes in the biosphere

• They have all been caused by increase of atmospheric temperature

Tags

NGSS.HS-LS4-5

Following ​ (a)   that cause the extinction of over ​ (b)   of species in a geologically rapid time period, ​ (c)   occurs, causing new species to ​ (d)   because of a ​new set of ​ (e)  

• mass extinction events
• 75%
• adaptive radiation
• evolve
• ecological conditions
• 50%
• 90%
• evolution
• natural selection
• genes

After the third half-life, how much of the sample is left?

• 1/2
• 1/3
• 1/16
• 1/8

Tags

NGSS.HS-PS1-8