Yes, life span is a definite characteristic of living organisms.

Characteristics of Living Organisms:

1. Cellular Organization: All living organisms are composed of one or more cells which are the basic unit of life.

2. Metabolism: Living organisms require energy to carry out their life processes. They obtain energy through metabolic processes that take place in their cells.

3. Homeostasis: Living organisms maintain a stable internal environment through a process called homeostasis. They regulate their internal conditions (such as temperature, pH, and water balance) to maintain a stable state.

4. Growth and Development: Living organisms grow and develop throughout their life cycle. They follow a specific pattern of development that is determined by their genetic makeup.

5. Response to Stimuli: Living organisms respond to stimuli from their environment. They can detect changes in their environment and respond accordingly.

6. Reproduction: All living organisms have the ability to reproduce. They pass on their genetic material to their offspring through various modes of reproduction.

7. Evolution: Living organisms have the ability to evolve over time. They undergo genetic changes that can lead to new traits and adaptations.

Life Span:

Life span refers to the length of time an organism can live under optimal conditions. It is a characteristic of all living organisms. Different species have different life spans, ranging from a few hours to several decades.

Factors that affect life span include genetics, environmental conditions, and lifestyle. For example, some species have genetic traits that allow them to live longer than others. Environmental conditions such as temperature, food availability, and predation can also affect life span. Lifestyle factors such as diet, exercise, and stress can also impact life span.

In conclusion, life span is a definite characteristic of living organisms. It is influenced by a variety of factors and varies from species to species. Understanding life span is important for understanding the biology of living organisms and for developing strategies to promote health and longevity.

Life span is definite characteristics of living organism bcoz life span is the period between birth to natural death and this character is not shown by non livings so we can say that life span is the characteristics feature of living organisms