Dictionary » S » Symmetry

Symmetry

Definition

noun, plural: symmetries

Correspondence of parts (in terms of form, size, distribution, or arrangement) on opposite sides of a dividing plane or on sides around an axis


Supplement

In biology, symmetry pertains to an attribute of organisms showing regularity in parts on a plane or around an axis. Symmetry may be:

  • bilateral symmetry – symmetry in which the opposite sides are similar; the external appearance is the same on the left and right sides in a sagittal plane (such as the body plan of most animals, including humans)
  • radial symmetry – symmetry in which the sides exhibit correspondence or regularity of parts around a central axis; lacking left and right sides (e.g. sea stars, sea anemones, jellyfish, sea urchins, and many flowers)


Related term(s):


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Book recommendation for exam

... Acoelomata and Coelomata; Protostomes and Deuterostomes, Bilateralia and Radiata; Status of Protista, Parazoa, Onychophora and Hemichordata; Symmetry. 3. Protozoa : Locomotion, nutrition, reproduction; evolution of sex; General features and life history of Paramaecium, Monocystis, Plasmodium, ...

See entire post
by bertstare
Sun Oct 21, 2012 2:19 pm
 
Forum: Zoology Discussion
Topic: Book recommendation for exam
Replies: 3
Views: 4756

Re:

... The biological DNA is only a new shape of this universal matrix, with increased level of complexity. The formula is composed by bi-lateral symmetry in all aspects, so, in its energy also. There is the growing energy and the decaying energy, which could be oja e teja, or yin and yang. So, ...

See entire post
by TheMatrixDNA
Sun Jul 29, 2012 9:29 pm
 
Forum: General Discussion
Topic: The question of life...
Replies: 47
Views: 30635

Please check my work?

... so don't laugh at me k thanks :* Which of the following are three common characteristics of echinoderms? A tube feet, circulatory system, body symmetry B marine-dwellers, endoskeletons, water-vascular system C bilateral symmetry, ossicles, respiratory system D mouths, protosomes, body symmetry ...

See entire post
by radicali
Thu Jun 14, 2012 8:57 pm
 
Forum: General Discussion
Topic: Please check my work?
Replies: 1
Views: 2278

Evolution of the Face and Head

The generally-accepted connection is not with feeding, but with symmetry and movement - bilateral animals, with propulsion driven equally from 2 sides, wind up with a directionality and a front end. Packing sense receptors and processors there, to deal with ...

See entire post
by Darby
Thu May 10, 2012 2:15 pm
 
Forum: Evolution
Topic: Evolution of the Face and Head
Replies: 4
Views: 2991

Molecular gene (genome) concept scientifically untenable

... bulge called a bleb. This is like the locking of a door — a change in cell structure arresting cell activity. The cell membrane also loses symmetry and detaches from the cytoskeleton, which leads to cell shrinkage, nuclear fragmentation, chromatin condensation, chromosomal DNA fragmentation, ...

See entire post
by PAWahid
Wed May 02, 2012 4:54 am
 
Forum: Molecular Biology
Topic: Molecular gene (genome) concept scientifically untenable
Replies: 12
Views: 20454
View all matching forum results

This page was last modified 09:45, 2 November 2013. This page has been accessed 20,355 times. 
What links here | Related changes | Permanent link