Which of the following can result in irregularities leading to cancer?           a. the body using cyclins to regulate the timing of the cell cycle   b. the body utilizing growth factors in development   c. the body programming its cells to die   d. the body failing to respond to signals that slow the cell cycle

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Match the description of each organism to the appropriate category