Are bilateral symmetry an animal with many lines of symmetry?

Most animals are bilaterally symmetrical with a line of symmetry dividing their body into left and right sides along with a “head” and “tail” in addition to a top and bottom. Only sponges (phylum Porifera) have asymmetrical body plans.

1. Can animals have bilateral symmetry?
2. What animal group has bilateral symmetry?
3. How many planes of symmetry does an animal with bilateral symmetry have?
4. Why is bilateral symmetry common in animals?
5. How does an animal with bilateral symmetry differ from an animal with radial symmetry?
6. Which of the following animals show bilateral symmetry?
7. Do reptiles have bilateral symmetry?
8. Which of the following animals body shows bilateral symmetry?
9. How is bilateral symmetry related to the ability of animals?
10. How do radial symmetry and bilateral symmetry differ?
11. How does bilateral symmetry help animals?
12. Are all animals motile?
13. When did bilateral symmetry appears in animals?
14. How many times has bilateral symmetry evolved in animals?

Can animals have bilateral symmetry?

All true animals, except those with radial symmetry, are bilaterally symmetrical. ... Animals in the phylum Echinodermata (such as sea stars, sand dollars, and sea urchins) display radial symmetry as adults, but their larval stages exhibit bilateral symmetry. This is termed secondary radial symmetry.

What animal group has bilateral symmetry?

People, dogs, cats, and elephants all have bilateral symmetry. Animals with radial symmetry have body parts arranged around a central point. Any line drawn from one side through the center to the opposite side will divide the animal into two symmetrical halves. Animals with radial symmetry have many lines of symmetry.

How many planes of symmetry does an animal with bilateral symmetry have?

Organisms with bilateral symmetry contain a single plane of symmetry, the sagittal plane, which divides the organism into two roughly mirror image left and right halves – approximate reflectional symmetry.

Why is bilateral symmetry common in animals?

Having bilaterally symmetrical bodies (the same on both sides along an axis) permit them to propel forward in a straight line. In evolutionary history, animals that moved quickly and efficiently from point A to point B would have been more successful and selected for than those who were ineffective at locomoting.

How does an animal with bilateral symmetry differ from an animal with radial symmetry?

Explanation: The bilateral symmetry animals body are divided into two equal halves from a particular radius passing through the centre. The direction of cutting is fixed. ... The radial symmetry animals body are cut into two equal halves from all the radii of the animals body passing through the centre.

Which of the following animals show bilateral symmetry?

From the animals mentioned above, the body of the earthworm shows bilateral symmetry. Explanation: An earthworm is an organism that belongs to phylum Annelida. It has a bilaterally symmetrical body.

Do reptiles have bilateral symmetry?

Bilateral symmetry is characteristic of the vast majority of animals, including insects, fishes, amphibians, reptiles, birds, mammals, and most crustaceans.

Which of the following animals body shows bilateral symmetry?

Answer : The body of animal c) Earthworm shows bilateral symmetry.

How is bilateral symmetry related to the ability of animals?

How is bilateral symmetry related to the ability of animals to move? Animals with bilateral symmetry can move in a consistent direction.

How do radial symmetry and bilateral symmetry differ?

The balanced distribution of the body shapes is referred to as the biological symmetry. ... The key difference between radial and bilateral symmetry is that radial symmetry generates identical body halves around the central axis whereas bilateral symmetry generates only two sides as left and right.

How does bilateral symmetry help animals?

Characteristics of Animals That Are Bilaterally Symmetrical

In addition to having a more developed nervous system, bilaterally symmetrical animals can move more quickly than animals with other body plans. This bilaterally symmetrical body plan may have evolved to help animals better find food or escape predators.

Are all animals motile?

All animals are eukaryotic, multicellular organisms, and almost all animals have specialized tissues. Most animals are motile, at least during certain life stages. Animals require a source of food to grow and develop. All animals are heterotrophic, ingesting living or dead organic matter.

When did bilateral symmetry appears in animals?

It is likely that the ancestor of Bilateria appeared at the end of the Vendian period which is the last geological period of the Neoproterozoic Era preceding the Cambrian Period. It lasted from approximately 635 to 541±1 million years ago.

How many times has bilateral symmetry evolved in animals?

Among higher metazoans, bilateral symmetry appears to have evolved only once (1). Because of this solitary origin, and because it happened so long ago, the evolution of bilateral symmetry is difficult to study. Fortunately, asymmetrical forms evolved many times among higher Metazoa (2, 3).