Question

What is it called when animals have no symmetry?

Answer 1

There is a ton of biodiversity on the planet. Animals are separated into several different groups based on their characteristics. One of the ways in which animals are separated is by the symmetry of their body.

Complete answer:
Different animals are shaped in different ways. This is dependent on the habitat and the lifestyle of the animal. Most of the higher organisms on earth show bilateral symmetry which means that their body can be divided into two identical parts. There is also radial symmetry where the animal can be cut radially into equal symmetrical parts.
There are also animals that have no symmetry, these are called asymmetric animals. Asymmetric animals do not have any form of symmetry no matter how they are divided. Animals like the amoeba come into this category. This means that there is no symmetry between the different portions of the body. These animals are typically very simple and they don’t show much body structure. Many members of the Porifera or the sponge family do not show symmetry. This is an important adaptation for this animal because sponges survive on the seafloor. Thus their bodies are soft and can withstand the immense pressure of the water.

Note:
Those animals which do not show symmetry are known as asymmetric organisms. These animals cannot be divided into symmetrical parts. This means that their body does not show any symmetry hence the animal is asymmetric.