Ever notice that all plants and animals have a left/right mirror image?

[exchemist]

If you draw a line from the middle of your forehead, to your crotch, your left and right sides are mirror images. Same with all animals, and pretty much with plants too.

Why?

Bilateral symmetry is a features of some groups of animals but not all, e.g. starfish and sea urchins (echinoderms), which have five-fold symmetry.

It is demonstrably NOT a feature of plants, at all. Just look at where the branches come out of a tree trunk.

In animals, bilateral symmetry is a common body plan due to having a mouth and sensory apparatus at one end, defining a "front" and "rear" end and also, commonly, "upper" and "lower" parts due to organs of locomotion, protection from predators, etc. Once these directions have been defined, a bilaterally symmetrical shape is the usual result.

More here: Symmetry in biology - Wikipedia

 

[Altfish]

If you draw a line from the middle of your forehead, to your crotch, your left and right sides are mirror images. Same with all animals, and pretty much with plants too.

Why?

Have you seen a flouder...
Google Image Result for https://cdn3.bigcommerce.com/s-uy636a/products/388/images/1630/Flounder-28-FM-5-1200__55297.1489675555.600.600.jpg?c=2

 

[ChristineM]

If you draw a line from the middle of your forehead, to your crotch, your left and right sides are mirror images. Same with all animals, and pretty much with plants too.

Why?

Bilateral organisms are not generally 100% bilateral. Im an artist and have spent some time studying facial symmetry.

The closer to a mirror image a face is represents (to humans) attractiveness. Most film/tv stars have close to symmetrical faces. Average Joe (or Josephine) Bloggs in the street, not so much

I prefer a little difference between left and right, it portrays character.

DaVinci had it right

 

[beenherebeforeagain]

Bilateral symmetry is a features of some groups of animals but not all, e.g. starfish and sea urchins (echinoderms), which have five-fold symmetry.

It is demonstrably NOT a feature of plants, at all. Just look at where the branches come out of a tree trunk.

In animals, bilateral symmetry is a common body plan due to having a mouth and sensory apparatus at one end, defining a "front" and "rear" end and also, commonly, "upper" and "lower" parts due to organs of locomotion, protection from predators, etc. Once these directions have been defined, a bilaterally symmetrical shape is the usual result.

More here: Symmetry in biology - Wikipedia

It's also clear that humans (and other 'bilateral' animals) are only approximately bilateral along ONE axis...viewed from top or side, a human is obviously not symmetrical.

 

[Valjean]

It's also clear that humans (and other 'bilateral' animals) are only approximately bilateral along ONE axis...viewed from top or side, a human is obviously not symmetrical.

Nor are we internally symmetrical.