Which is a unique feature of mars?
a.
the thick atmosphere—made mostly of carbon dioxi...
Which is a unique feature of mars?
a.
the thick atmosphere—made mostly of carbon dioxide—absorbs solar radiation, heating up and make the atmosphere very hot
b.
it is the smallest planet and has the shortest period of revolution around the sun.
c.
the planet’s surface is covered with red, iron-oxide dust
d.
it is the only planet with permanent liquid water on its surface.
Answers: 2
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How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures
Answers: 1
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