In the experiment, the experimenter heated from one end a test tube with ciliates to a certain temperature and observed the movement of ciliates into less heated layers of water. Give another example of a similar phenomenon in animals.
Hydra squeezing when touched, OR motor reaction of the amoeba in response to the addition of salt crystals to the solution (chemotaxis).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.