Table of Contents
- 1 What does bilateral symmetry allow animals to do?
- 2 What does bilateral symmetry mean in biology?
- 3 What is bilateral symmetry give an example of an animal with bilateral symmetry?
- 4 What is bilateral symmetry in plants?
- 5 Which of the following animals are bilaterally symmetrical?
- 6 How does radial symmetry help animals?
- 7 What animal phyla have bilateral symmetry?
- 8 Which of the following is bilaterally symmetrical?
What does bilateral symmetry allow animals to do?
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.
What does bilateral symmetry mean in biology?
Definition of bilateral symmetry : symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves.
What is bilateral symmetry give an example of an animal with bilateral symmetry?
Examples of animals that possess bilateral symmetry are: flatworms, common worms (“ribbon worms”), clams, snails, octopuses, crustaceans, insects, spiders, brachiopods, sea stars, sea urchins, and vertebrates. The symmetry of an animal generally fits its lifestyle.
What 2 benefits do animals with bilateral symmetry enjoy?
Swift movement and good sense organs (nose, eyes, mouth, and ears) help animals with bilateral symmetry obtain food and avoid enemies; characteristics that have helped this type of animal become more advanced and survive other animals.
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.
What is bilateral symmetry in plants?
When a flower can be divided by a single plane into two equal parts, it is zygomorphic, or bilaterally symmetrical, as in the snapdragon, orchid, and sweet pea.
Which of the following animals are bilaterally symmetrical?
The correct answer is Aschelminthes. Aschelminthes is a group of animals that is bilaterally symmetrical and triploblastic.
How does radial symmetry help animals?
Radial symmetry is advantageous to sedentary organisms because sensory receptors are evenly distributed around the body. For sessile (sedentary) organisms, radial symmetry is useful because the animal can just “sit down” and grab food or detect threats from all directions.
Can an animal have both radial and bilateral symmetry?
Biradial symmetry is found in organisms which show morphological features (internal or external) of both bilateral and radial symmetry. Unlike radially symmetrical organisms which can be divided equally along many planes, biradial organisms can only be cut equally along two planes.
How do you differentiate bilaterally symmetrical animals?
Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs. ventral), and right and left sides. All true animals, except those with radial symmetry, are bilaterally symmetrical.
What animal phyla have bilateral symmetry?
The vast majority of animals display bilateral symmetry; also known as plane symmetry, this is a trait that applies to 99\% of all animals, in the majority of phyla: Chordata, Annelida, Arthropoda, Platyzoa, Nematoda, and most Mollusca.
Which of the following is bilaterally symmetrical?
Detailed Solution. The correct option is Earthworm. The earthworm is a bilaterally symmetrical organism. It belongs to the phylum Annelida.