Problem 15
In which era did the Ediacaran fauna live? A) Precambrian C) Mesozoic B) Paleozoic D) Cenozoic
Problem 15
Why do many scientists think that dinosaurs were warm-blooded?
Problem 16
What are stromatolites? How do they form?
Problem 17
Define the term species.
Problem 17
Discuss why trilobites are classified as index fossils.
Problem 18
It recently was estimated that \(T\). rex could run no faster than about \(11 \mathrm{~m} / \mathrm{s}\). At this speed, how long would it take T. rex to run \(200 \mathrm{~m}\) ?
Problem 18
Compare and contrast the most significant difference between Precambrian life- forms and Paleozoic life-forms.
Problem 19
A typical ornithopod (plant-eating dinosaur that walked on two legs) probably moved at a speed of about \(2 \mathrm{~m} / \mathrm{s}\). How long would it take this dinosaur to run \(200 \mathrm{~m}\) ?
Problem 19
Describe how natural selection is related to organic evolution.
Problem 21
Infer Use the outlines of the present-day continents to make a sketch of Pangaea.
