Question

Which of the following is a natural example that proves there is early regulative development in humans?

A Monozygotic twinning
B There are a predictable number of cells at various time points in early development
C Exposure to teratogens can lead to defects that are obvious in the fetus
D The vast majority of humans are symmetrical in overall body structure
E Amniotic bands can lead to fetal disruptions

Answer 1

Monozygotic twinning is a natural example showcasing early regulative development in humans as it demonstrates a single zygote's ability to divide into two separate embryos, leading to identical twins.

Step-by-step explanation:

The natural example that proves there is early regulative development in humans is Monozygotic twinning. This phenomenon is when a single zygote divides into two separate embryos, which can lead to the birth of identical twins. This ability to form two complete, viable organisms from the early stages of an embryo, even at the two-cell stage, demonstrates the regulative capacity of human embryonic development. In other words, the development can adjust to produce two individuals from one initial set of genetic material, indicating a flexible developmental process in the early stages of human growth.