5. On a particular day in the 3rd Century BC, Eratosthenes knew that a well in Syene held no shadow whereas at the same time, a well in
Alexandria did. Draw shadows for identical flagpoles on three
different sized planets, if they exist. Notice that the difference in angles
is the same, but the distance between flagpoles is very different.

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

Dna replication or repair occurs in a cell in all of thw following situations except when