16. 1) Which of these is not needed by living organisms? A. space
B. gravity
C. air
D. water
E. energy

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales