Internet Exercise
Proterozoic
Evolution of life
1.
Go to the
following internet site:
http://www.newworldencyclopedia.org/entry/Proterozoic Read the information, and
answer the following questions:
a.
What is the timespan of the Proterozoic Era
b.
What are the divisions of the Proterozoic? And the most
important events during each. (There might be more than just one).
2.
Life on Earth:Watch this movie on You tube and
answer the following questions:
http://www.youtube.com/watch?v=7dhSjKrLtPQ
a.
Based on the latest theory, in what conditions has life
started?
b.
How do we know that just before the appearance of more
complex life forms the Earth experienced the biggest ice age?
c.
What happened with the primitive life forms during the
ice age?
d.
How do we call life forms living in extreme conditions?
e.
What happened on Earth as the ice age was ending? What
caused the warming at this time?
f.
What kind of life form caused the oxygen increase in the
atmosphere?
g.
What has happened in the deep sea after the increase of
the oxygen in the atmosphere?
h.
What is necessary for multicellular life? What is the
species which first had this material?
i.
What can the sponges do?
j.
Describe the famous find in New Found land Canada
(Mistaken Point)? How old the rocks are here? What made this fossils to be
preserved?
k.
What kind of features did scientists find here?
l.
How did they get nutrient without a mouth?
m.
Why were they dead end in evolution?
n.
How do the Ediacaran fauna differ from the Mistaken
Point fossils?
o.
What kind of environment was present here?
p.
What kind of body these animals have, and what could
they do?
q.
What was Kimberella?
r.
What kind of advantage bilateral symmetry gives to the
animals?
s.
When the sexual reproduction started? What was the name
of the animal that first had sex?
t.
Why sex is sooooo important?
u.
How do corals breed?
v.
Why sexual reproduction speeded evolution up?
w.
What kind of animal was growing in the fossil embryos?
How does scientist know that this animal was a predator?