Question

Briefly explain what is meant by the statement "human mortality rates are facultative."

Short answer

Facultative human mortality rates mean that these rates are adaptable and changeable according to varying conditions, and are not strictly fixed.

Step-by-step solution

Understanding Facultative

Facultative, in biology, refers to organisms that are capable of, but not restricted to, a particular function or mode of life. They can adapt to different conditions as per their convenience or environment.

Understanding Human Mortality Rates

Human mortality rates refer to the measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time.

Explaining Facultative Human Mortality Rates

If human mortality rates are referred to as 'facultative', it implies that these mortality rates are not fixed or constant. They can change or adapt depending on various factors such as environment, living conditions, medical advancements etc. Thus, they possess a certain degree of flexibility and adaptability.