10.- Biodiversity flourishes in Phanerozoic eon

Description

https://www.khanacademy.org/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/v/biodiversity-flourishes-in-phanerozoic-eon
PEDRO ALVAREZ JIMENEZ
Quiz by PEDRO ALVAREZ JIMENEZ, updated more than 1 year ago
PEDRO ALVAREZ JIMENEZ
Created by PEDRO ALVAREZ JIMENEZ over 9 years ago
106
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Resource summary

Question 1

Question
In multicellular organisms, how can they get variation of DNA?
Answer
  • With a high rate of mutations
  • With sexual reproduction
  • Only with recombination

Question 2

Question
Why did the ozone layer allow life on land?
Answer
  • It protected from U.V radiation
  • It protected from very high oxygen concentration
  • It protected from high temperatures

Question 3

Question
List the 3 eras that make up the Phanerozoic Eon
Answer
  • Paleozoic, Mesozoic and Phanerozoic
  • Paleozoic, Mesozoic and Cenoloic
  • Paleozoic, Mesozoic and Cenozoic

Question 4

Question
What was the Cambrian Explosion?
Answer
  • A period of high rate of volcanic activity
  • An great increasing of biodiversity
  • The killing of the most of microorganisms

Question 5

Question
Where did the meteorite that wiped out dinosaurs fall?
Answer
  • In the Gobi desert
  • In the middle of the Atlantic Ocean
  • In the Yucatán Peninsula

Question 6

Question
Which one of this two appeared before, flowers or grass?
Answer
  • Flowers and then grass
  • Grass and then flowers
  • Both of them at the same time

Question 7

Question
How old is our specie?
Answer
  • 20000 years ago
  • 200000 years ago
  • 2000000 years ago
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