Question

What is the term for a bilateral symmetric D2 extension?

1) Bilateral Symmetric D2 Extension
2) Symmetric D2 Extension
3) Bilateral Extension
4) D2 Extension

Answer 1

The correct term for a bilateral symmetric D2 extension is 'Bilateral Extension.' This reflects the human body's bilaterally symmetrical nature, where it can be divided into equal halves along a single longitudinal plane.

Step-by-step explanation:

The term bilateral symmetry refers to a condition where an object can be divided into two symmetrical parts across a unique plane, which is often referred to as a mirror plane. This means that the object has a left and a right side that are mirror images of each other. The human body is an example of bilateral symmetry, as it can be divided down its longitudinal axis into roughly equal and symmetrical halves. Unlike radial symmetry, seen in organisms like jellyfish, where there are multiple planes of symmetry, bilateral symmetry involves only one unique plane of division. Furthermore, bilateral symmetry extends to our senses, as they are also distributed in a symmetrical fashion,

In relation to the options provided:

Bilateral Symmetric D2 Extension

Symmetric D2 Extension

Bilateral Extension

D2 Extension

The correct term that describes the concept of bilateral symmetry as applied to the extension of the human body's plan would be Bilateral Extension (option 3). This reflects the fact that the extension follows the bilaterally symmetrical nature of the human body.