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Problem

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question

The animals having radial symmetry are considered to be at a lower evolutionary stage than those having bilateral symmetry. Why is this true? What is meant by the term secondarily radial?

category

biology

options

  1. Secondarily radial refers to the primary development of radial symmetry in an organism
  2. Bilaterally symmetrical animals are considered more primitive due to their limited range of movement
  3. Radial symmetry provides better mobility
  4. Bilateral symmetry is a characteristic of invertebrates only
  5. Radially symmetrical animals are considered at a lower evolutionary stage due to their simple body construction and lack of distinct internal organs or central nervous system. Secondarily radial refers to organisms like echinoderms that evolved from a bilaterally symmetrical ancestor and exhibit radial symmetry as adults but bilateral symmetry as larvae.
  6. Secondarily radial refers to the secondary development of bilateral symmetry in an organism
  7. Radial symmetry is associated with more advanced sensory organs
  8. Bilaterally symmetrical animals have less distinct internal organs
  9. Radially symmetrical animals have more complex reproductive systems

src

stemez-Biology

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Source and history

upstream_id / Original problem ID
3007
task_id
6a272951-5a08-50af-af1e-137b0d580814
task_key
default--test--3007
task_revision_id
1
config / split
default / test

Official source

initial import