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Questions tagged [bilateria]

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Do gastropelecid hatchet fish have powered flight?

These sites contradict each other: Source 1 claims that hatchet fish do not fly, but simply jump out of the water instead: 'Species that were once thought to have powered flight, the Pantodontidae ...
Harrychink's user avatar
3 votes
1 answer
220 views

Did bilateral symmetry evolved just once?

If I understood correctly, all bilaterians come from a single organism (the Urbilaterian) that showed this type of body plan for the first time at the end of the Ediacaran. Does that mean that ...
Swike's user avatar
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2 votes
1 answer
153 views

What is the biological advantage of bilaterity?

I was wondering why there were so many bilateral species (under the bilateria clade) in comparison with the cnidaria clade. I have two or so questions: Am I (or are we) unaware of the diversity and ...
SemAntys's user avatar
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