Students are measuring the jump height of frogs and the length of their back legs to see if there is a connection. They will measure both the height and length in centimeters. They should repeat the trial time(s) for the jump height and time(s) for the leg length.
A. many, one
B. one, many
C. many, many
D. one, one

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?