Differences between the spines of warm-water and cold-water

The endosymbiosis theory
June 21, 2017
Design a monitoring and schuduling program for irrigation
June 21, 2017

Spiny species of diatoms are found in both warm subtropical waters and colder areas. Because warm water is less dense than cold water, would you predict any differences between the spines of warm-water and cold-water individuals? Why?