. It refers to physical or physiological differences between males and females, including both primary sex characteristics (the reproductive system) and secondary characteristics with the aid of hormones.*1 pointYour answer

The statement is referring to "Sexual Dimorphism".

Step 1: Understanding the term Sexual Dimorphism refers to the physical or physiological differences between males and females. These differences can be observed in many species, including humans.

Step 2: Identifying the differences These differences are categorized into two types: primary sex characteristics and secondary sex characteristics.

Step 3: Primary Sex Characteristics Primary sex characteristics are those that are directly involved in reproduction. In humans, this includes organs such as ovaries in females and testes in males.

Step 4: Secondary Sex Characteristics Secondary sex characteristics are those that are not directly involved in reproduction but generally distinguish males from females. These characteristics emerge during puberty, such as the development of breasts in females and facial hair in males.

Step 5: Role of Hormones Hormones play a crucial role in the development of these characteristics. For example, the hormone testosterone promotes the development of characteristics like muscle growth and body hair in males, while estrogen leads to the development of characteristics like breast growth and the menstrual cycle in females.