The earliest vascular land plants were characterized by which features?
A)seed-producing and rootless
B)seedless and root-bearing
C)seedless and rhizome-bearing
D)seed-bearing and rhizome bearing
E)seedless and rootless
C
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This figure shows the geologic timescale. Which period listed below would be part of the Paleozoic?
A) Permian
B) Pennsylvanian
C) Mississippian
D) Cambrian
E) All of these are correct.
An activity is labor-intensive if it employs a low ratio of workers to the amount of capital invested in machinery
Indicate whether the statement is true or false.
Streams carry most of their sediment load in the form of suspended load
Indicate whether this statement is true or false.
What country is the fastest-growing emitter of greenhouse gases in the world?
A) North Korea B) Japan C) South Korea D) China E) Taiwan