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What statement best describes the chelicerates? They are a paraphyletic lineage. All orders within the lineage...

What statement best describes the chelicerates?

They are a paraphyletic lineage.

All orders within the lineage are extant.

Both book lungs and trachea offer increased surface area for gas exchange.

They have colonized all habitats except marine.

More than one of the above is correct.

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Answer #1

Answer - more than one of the above is correct.

Explanation:-

They are paraphyletic lineage - correct

Limulus, ixodes, and rhiphicephalus are the most recent descendants and share common ancestors.

All orders within the lineage are extant- incorrect

Chelicerates have several orders within the lineage which are extinct such as eurypterids, uraraneida etc.

Both book lungs and trachea offer increased surface area for gas exchange- correct

Terrestrial chelicerates generally have book lungs and trachea , the book lungs looks like folded pages and these folds are responsible for maximizing the surface area for gas exchange.

They have colonised all habitats except marine- incorrect

The chelicerates originated in the middle Cambrian period as marine marine animals , horseshoe crab is one of the surviving marine species.

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