Bilateria Quiz

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Questions and Answers

Which phylum is not included in the grade Bilateria?

Cnidaria (correct)
Nematoda
Mollusca
Arthropoda

What type of symmetry is exhibited by the animals in grade Bilateria?

Bilateral symmetry (correct)
Asymmetry
Spherical symmetry
Radial symmetry

Which animals have secondarily developed radial symmetry?

Nematodes
Annelids
Platyhelminthes
Echinoderms (correct)

What type of animals are included in grade Bilateria?

Triploblastic (B) Signup and view all the answers

What type of symmetry is exhibited by animals in grade Bilateria?

Bilateral symmetry (A) Signup and view all the answers

What is a distinct feature of animals with bilateral symmetry?

Distinct anterior end (B) Signup and view all the answers

Which type of symmetry is characterized by the right side being approximately the same as the left side?

Bilateral symmetry (D) Signup and view all the answers

Animals with bilateral symmetry have a distinct anterior and posterior end

True (A) Signup and view all the answers

Bilateral symmetry means the right side of the animal is different from the left side

False (B) Signup and view all the answers

Animals in grade Bilateria exhibit radial symmetry

False (B) Signup and view all the answers

Explain the defining characteristic of animals in the grade Bilateria.

Animals in the grade Bilateria exhibit bilateral symmetry, with the right side being approximately the same as the left side and distinct anterior and posterior ends. Signup and view all the answers

Describe the significance of bilateral symmetry in animals.

Bilateral symmetry allows animals to have specialized sensory organs and movement in a specific direction, contributing to their evolutionary success and complexity. Signup and view all the answers

What is the advantage of having a distinct anterior and posterior end in animals with bilateral symmetry?

The distinct anterior and posterior ends in animals with bilateral symmetry allow for efficient movement and orientation towards food sources and away from threats. Signup and view all the answers