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WorksheetsSBI4U population homework 1
Total questions: 10
Worksheet time: 3hrs 30mins
Name
Class
Date
1.
The rise of photosynthetic cyanobacteria increased oxygen content in the air from 0 to 10% in a short period of time. This brought...
a)
massive oxidation damage and death of most lifeforms
b)
abundant fuel to help all existing lifeforms thrive
c)
no significant effect on the other lifeforms
d)
the extinction of cyanobacteria themselves
2.
The appearance of organelles, such as mitochondria, dawns the eon of eukaryotic cells. Which is more likely the origins of organelles?
a)
Predatory and parasitic relationships between species
b)
Genetic exchange within the same species
3.
The "Cambrian Explosion" dawns the era of rapidly-evolving arm race between...
a)
predators and preys
b)
animals and plants
c)
bacteria and viruses
d)
the privileged and the oppressed
4.
300 million years ago, the plant population bloomed to utilize the abundant...
a)
CO2
b)
fossil fuels
c)
O2
d)
N2
5.
The CO2 converted to organic molecules by ancient plants are now released back to the atmosphere by human when we...
a)
plant trees
b)
burn fossil fuels
c)
use renewable energy
d)
pursue sustainable development
6.
Which is the least likely factor contributing to the worst massive extinction event 252 million years ago?
a)
rise of mammals
b)
meteor strike
c)
volcano eruption
d)
rapid climate change
7.
The population flowering plants surged about 100M years. They received help mainly from...
a)
co-evolving, pollinating insects
b)
dinosaurs that consume them
c)
the meteor that destroyed dinosaur
d)
the rise of mammals
8.
66 million years ago, dinosaurs were wiped out in a mass extinction event. Which is the least likely factor that contributed to the event?
a)
Activity of human
b)
Catastrophe (meteor strike)
c)
Change in the climate
d)
Loss of food
9.
In each of the mass extinction event, some survived as they...
a)
adapted to the change in the environment
b)
did not adapt to the change in the environment
10.
What is the take-away lesson for my future?
a)
I will expect changes and adapt to them.
b)
Changes make me uncomfortable, so I avoid them.
c)
Changes are always a good thing for everybody.
d)
Changes are awlays a bad thing for everybody.
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