WorksheetsBiology Quiz EV6 Late Precambrian
Total questions: 12
Worksheet time: 7mins
What percentage of Earth’s history passed before multicellular life evolved?
20%
40%
60%
80%
The late Precambrian is the time from about 1 million to half a million years ago.
true
false
Which of these geologic events occurred during the Late Precambrian? (check all that apply)
Continents drifted; colliding to form a gigantic supercontinent then breaking up again and moving apart
Carbon dioxide levels in the atmosphere rose and fell.
Increased amounts of volcanic activity.
Several Ice ages occured.
Rains decreased, drying up most of Earth's rivers and lakes
One ice age was so cold that snow and ice completely covered the planet What is the name for this event.
Snowball Earth
Ice World
The Icebox Event
The Great Freeze
Which of these best describes the Greenhouse Effect?
Nitrogen levels increase, trapping more heat on Earth’s surface causing the climate became warmer.
Carbon dioxide levels decrease, preventing their absorption of heat causing the climate to become warmer.
Carbon dioxide levels increase, trapping more heat on Earth’s surface causing the climate became warmer.
Nitrogen levels decrease, preventing their absorption of heat causing the climate to become warmer.
Which of these were important adaptations that evolved in organisms during the late Precambrian Period?(Check all that apply)
protein synthesis
multicellularity
sexual reproduction
the phospholipid bilayer
specialization of cells
Sexual reproduction created much more variety among offspring. This increased the chances that at least some of them would survive when the environment changed.
true
false
The specialization of cells increased the speed at which evolution could occur.
true
false
Which of these are true of the evolution of multicellularity? (check all that apply)
organisms became larger
multicellular organisms were more efficient
multicellular cells could now work together or independently.
by 1 billion years ago, the first multicellular organisms had evolved
multicellularity may have developed from the ribosomes of specialized organelles
When many or even most species abruptly disappear from Earth this is known as a/an ________________.
mass extinction
extinction event
Precambrian explosion
Snowball Earth
There have been ___________ mass extinctions in Earth’s history.
three
five
seven
ten
Many scientists believe that Earth is currently going through its sixth mass extinction.
true
false
