Author Question: Tar sand is a type of sandstone in which viscous, asphalt-like hydrocarbons fill the pore spaces. ... (Read 105 times)

TVarnum · **on:** Jul 13, 2018

Tar sand is a type of sandstone in which viscous, asphalt-like hydrocarbons fill the pore spaces.
Indicate whether the statement is true or false

Question 2

Seedless vascular plants evolved which of the following features of modern plants?
A)seeds only
B)roots only
C)leaves only
D)secondary growth only
E)roots, leaves, and secondary growth