Arthropods: Features and Diversity
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Questions and Answers

What is the main reason arthropods are considered excellent for protection?

  • They have a hard exoskeleton of chitin (correct)
  • They live in virtually every habitat on earth
  • They have numerous sense organs
  • They are very active and energetic animals

Which characteristic allows arthropods to have infinite possibilities for adaptive modifications?

  • Well-developed head (cephalization)
  • Hard exoskeleton of chitin
  • Jointed feeding appendages
  • Segmented body (correct)

What percentage of all known animals does the phylum Arthropoda include?

  • 50%
  • 1%
  • 33%
  • 66% (correct)

What is the distinctive characteristic that allows some arthropods to fly over 30 mph?

<p>&quot;Jointed legs&quot; (A)</p> Signup and view all the answers

Which feature enables arthropods to be the only invertebrates capable of flying at high speeds?

<p>&quot;Jointed legs&quot; (B)</p> Signup and view all the answers

What is the estimated ratio of arthropods to humans in terms of individuals?

<p>200:1 (B)</p> Signup and view all the answers

Which phylum is mentioned as having many fossils and being one of the most ancient?

<p>Arthropods (A)</p> Signup and view all the answers

Which animal species has remained unchanged and is considered one of the oldest on earth?

<p>Triops cancriformis (D)</p> Signup and view all the answers

When did arthropods become the dominant lifeforms and start to dominate the fossil record?

<p>Shortly after the Cambrian explosion (D)</p> Signup and view all the answers

What event is mentioned as occurring shortly after spider-like and centipede-like animals appeared?

<p>Plants moving onto land (B)</p> Signup and view all the answers

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