Which statements about fossils are true? select all that apply.
a. they can us interpret earth's past.
b. they are great environmental indicators.
c. they are created from all living things that are buried.
d. they us better understand modern-day life-forms and their ancestors.

Overall cooling of earth's climate causes

Which statement is a proper biconditional statement for the conditional statement: if a line intersects a line segment at its midpoint, then it is a segment bisector. if a line is a segment bisector, then it intersects the line segment at its midpoint. if a line does not intersect a line segment at its midpoint, then it is not a segment bisector. a line intersects a line segment at its midpoint if, and only if, it is a segment bisector. if a line is not a segment bisector, then it does not intersect the line segment at its midpoint.

Which of the following is not an effect of land substance