Which is true? a. Every meridian is actually a circle rather than a line
b. Every meridian is the same length and has the same terminus (beginning and ending points)
c. Every parallel begins and ends at the Poles
d. Every parallel is the same length

The blue segment below is a diameter of oo. what is the length of the radius of the circle?

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.

One disadvantage that darwin faces today is w. enemy attacks x. natural disasters y. lack of land bridge z. high population density