Which theory asserts that the human is preformed at conception and only grows in size until birth?

Which theory asserts that the human is preformed at conception and only grows in size until birth?

• A. Mechanistic Theory
• B. Preformationist Theory
• C. Organismic Theory
• D. Behavioralist Theory

Answer: (B)

The main idea here is preformationism—the belief that a fully formed human exists from conception, and the embryo simply grows in size as pregnancy progresses. This view imagines a miniature version of a person already present in the sperm or egg, so development is just enlargement until birth. That makes it the best fit for the statement, since it directly asserts preformation at conception and growth-only change in size. In contrast, a mechanistic view treats development as changes driven by physical processes and environmental influences acting like a machine; an organismic view emphasizes an inherent, natural unfolding of a whole organism toward its mature form; behaviorist theory focuses on learning and behaviors shaped by experience rather than the physical growth of the body.

The main idea here is preformationism—the belief that a fully formed human exists from conception, and the embryo simply grows in size as pregnancy progresses. This view imagines a miniature version of a person already present in the sperm or egg, so development is just enlargement until birth. That makes it the best fit for the statement, since it directly asserts preformation at conception and growth-only change in size.

In contrast, a mechanistic view treats development as changes driven by physical processes and environmental influences acting like a machine; an organismic view emphasizes an inherent, natural unfolding of a whole organism toward its mature form; behaviorist theory focuses on learning and behaviors shaped by experience rather than the physical growth of the body.