List the main properties of living nature What role does irritability play in living nature?

1. List the main properties of living nature 2. What role does irritability play in living nature? 3. What is the irritability threshold? 4. How is irritability manifested in organisms without a nervous system?

1) The main properties of wildlife:

the unity of chemical elements (hydrogen, oxygen, nitrogen);
assimilation and dissimilation processes;
growth, development;
constant consumption of energy from outside;
reproduction, variability, heredity;
maintaining internal constancy and the ability to self-regulate;
irritability;

2) In living nature, irritability plays the role of protection from the external environment and the ability to adapt a living system to new conditions.

3) The threshold of irritability is the minimum energy flow required for irritation to occur.

4) Organisms that do not have a nervous system show irritability by perceiving and reacting to it with the help of the entire surface of the body.