The evolution of roots allowed plants independence from moist environments and to spread over all land types
a. True
b. False
False
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Developing countries have a higher share of primary and secondary sector workers and a smaller share of tertiary sector workers than developed countries
Indicate whether the statement is true or false.
Cities in developing countries containing a complex mix of ethnic groups show evidence of which urban structure model?
A) multiple nuclei B) concentric zones C) Griffin-Ford model D) informal settings E) sectors
The doubling time is an important aspect of the population growth rate of a city, country, or region. It is also referred to as the rule of __________
Fill in the blank(s) with correct word
Photosynthetic autotrophs changed the composition of the atmosphere during the oxygen revolution
Indicate whether the statement is true or false