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What animal group has bilateral symmetry?
Thus, only one plane of symmetry will divide a bilateral animal into symmetrical halves, the median longitudinal, or sagittal, plane. Bilateral symmetry is characteristic of the vast majority of animals, including insects, fishes, amphibians, reptiles, birds, mammals, and most crustaceans.
What was the first animal to have bilateral symmetry?
The bilateral symmetry in Animals is probably developed from a sea anemone (Cnidaria) with radially symmetry (Nematostella vectensis) [7–11]. In addition, many plants exhibit different kinds of symmetry, e.g., rotational symmetry, but also bilateral symmetry.
Why is bilateral symmetry most beneficial for mobile organisms?
Why is bilateral symmetry most beneficial for mobile organisms? It permits sensory information to be received from any direction. It correlates with segmentation and increased efficiency of movement. It allows the most forward portion of the body to sense new environments before entering them.
Are Cnidaria bilateral?
Comparative analysis provides evidence that bilateral symmetry is a primary character of Cnidaria. All anthozoan taxa are characterized by bilateral symmetry. The bilateral symmetry of Cnidaria is thought to be inherited from the common ancestors of both cnidarians and triploblastic bilaterians.
Which of the following group of animals is bilaterally?
The correct answer is Aschelminthes. Aschelminthes is a group of animals that is bilaterally symmetrical and triploblastic.
Which of the following is an example of bilaterally symmetrical and triploblastic animal?
Aschelminthes are bilateral symmetrical and triploblastic animals, e.g. Ascaris.
What are some examples of animals with bilateral symmetry?
Most phyla are included in this, such as Arthropoda, Annelida, Chordata, Nematoda, Platyzoa, and the majority of Mollusca. Therefore, as well as humans and marine mammals, such as whales, examples of animals with bilateral symmetry include cats, dogs, mice, bears, elephants, crabs, wolves, frogs, birds, giraffes, and badgers.
What is a radially symmetrical animal?
Unlike a bilaterally symmetrical body, which has only one axis about which it can be equally divided, a radially symmetrical animal can be divided into equal halves along one of several axes, so long as that axis passes through the body’s center. A starfish is a good example of this type.
What phyla have bilateral symmetry?
Bilateral symmetry, which is also called plane symmetry, exists in 99 percent of animals. Most phyla are included in this, such as Arthropoda, Annelida, Chordata, Nematoda, Platyzoa, and the majority of Mollusca.
What type of symmetry is found in the animal kingdom?
The other main type of symmetry found in the animal kingdom is radial symmetry. Unlike a bilaterally symmetrical body, which has only one axis about which it can be equally divided, a radially symmetrical animal can be divided into equal halves along one of several axes,…