Which term describes the left and right halves that are mirror images of each other?

Which term describes the left and right halves that are mirror images of each other?

• A. None
• B. Asymmetry
• C. Radial symmetry
• D. Bilateral symmetry

Answer: (D)

Bilateral symmetry describes left and right halves that are mirror images. In this arrangement, the body can be divided along a plane down the middle into equal left and right parts that mirror each other, a pattern seen in humans and many other animals. This is different from radial symmetry, where there are multiple planes of symmetry around a central axis (like a sea anemone), and from asymmetry, where no consistent left-right symmetry exists. So the term that fits is bilateral symmetry.

Bilateral symmetry describes left and right halves that are mirror images. In this arrangement, the body can be divided along a plane down the middle into equal left and right parts that mirror each other, a pattern seen in humans and many other animals. This is different from radial symmetry, where there are multiple planes of symmetry around a central axis (like a sea anemone), and from asymmetry, where no consistent left-right symmetry exists. So the term that fits is bilateral symmetry.