What are the three types of body symmetry in animals?

Answer 1

Radial Symmetry

Radial symmetry is rotational symmetry around a fixed point known as the center. Radial symmetry can be classified as either cyclic or dihedral.

Cyclic symmetries are represented with the notation Cn, where n is the number of rotations. Each rotation will have an angle of 360/n. For example, an object having C3 symmetry would have three rotations of 120 degrees.

Dihedral symmetries differ from cyclic ones in that they have reflection symmetries in addition to rotational symmetry. Dihedral symmetries are represented with the notation Dn where n represents the number of rotations, as well as the number of reflection mirrors present. Each rotation angle will be equal to 360/n degrees and the angle between each mirror will be 180/n degrees. An object with D4 symmetry would have four rotations, each of 90 degrees, and four reflection mirrors, with each angle between them being 45 degrees.

Bilateral Symmetry

Bilateral symmetry is symmetry across a line of reflection. Are people symmetric? We think we are, but upon closer analysis, we are less symmetric than we think. The more simple the creature (ants --> elephants), the more likeley it is that it will be perfectly symmetric.

We took two professors, cut and pasted half of their head in Photoshop, and flipped that half horizontally. We then aligned the two halves so that it came closest ro resembling a human head. You be the judge on how good of a job we did and how symmetric people around us are in general ...

Asymmetrical Symmetry

Asymmetry is the absence of, or a violation of, symmetry.

Answer 2

In plants

Asymmetry - Cannot be cut into two equal halves in any plane

Symmetry - Actinomorphic (equavalent to Radial symmetry in animals) - Cut in to two equal halves in the centre at any plane

Zygomorphic (equavalent to Bilateral symmetry in animals) - Cut into two equal halve only in one plane in the centre

Answer 3

coronal or frontal (dividing the body into back and front)

sagittal (dividing the body into right and left)

mid-sagittal (same as above but equal parts)

transverse (dividing the body into top and bottom)

(all assuming the body is in anatomical position)

Answer 4

One type of body symmetry animals display is bilateral symmetry. This means they have symmetry across one plane (known as the sagittal plane, and directly down the centre of their body), which means one side of their body approximately mirrors the other side. This is commonly seen in all vertebrates, and many invertebrates such as arthropods.

However, some such as jellyfish have radial symmetry. Animals with radial body symmetry display a regular arrangement of body parts around a central axis, usually in a circular pattern.

Then there is asymmetry. This is a lack of any organised pattern of symmetry, such as that displayed by sponges.

Answer 5

asymmetrical: no symmetry example: sponges

radial symmetry: has a center and if cut through the center, will produce two identical parts. example: jellyfish, starfish.

bilateral symmetry: when cut vertically in half, each half is a mirror image of the other. Examplo: humans, butterflies, etc.

Answer 6

Ok here they are!! Bisymmetry Asymmetry Radial Symmetry:

Answer 7

The four types are: 1. Radial Symmetry 2. Bilateral Symmetry 3. Pentameric Symmetry 4. Biradial Symmetry Hope this helps :)

Answer 8

asymmetry,radial symmetry,and bilateral symmetry

Answer 9

bilateral radial and asymmetrical