This way you'll give your organism time to adjust to the change and make the best use of it before moving to the next level. (fitnessandpower.com)
Some proteins give an organism's body its structure, whether in the cell's internal skeleton or in a strand of hair. (discovermagazine.com)
We generally assume that primitive organisms are not sensitive to as many different kinds of stimuli as higher organisms are and that the sensory systems evolve to give organisms access to more and more types of stimuli. (religion-online.org)