Fish Classes Introduction

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Questions and Answers

What is the smallest fish mentioned in the text?

  • Stout infantfish (correct)
  • Pygmy goby
  • Walking catfish
  • Mangrove killifish

What are fish ribs primarily used for?

  • Supporting fins (correct)
  • Breathing
  • Balancing
  • Swimming

Which fins are considered as part of the 'appendicular skeleton' in fish?

  • Pectoral and caudal fins
  • Caudal and pectoral fins
  • Pectoral and pelvic fins (correct)
  • Dorsal and ventral fins

What is the main function of segmented muscles in fish?

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

Which fish can be found stuffed into insect tracks in rotting logs when the mangrove swamps dry up?

<p>Mangrove killifish (B)</p> Signup and view all the answers

What is the common feature of fish muscles related to movement?

<p>Segmented into zig-zag bands (D)</p> Signup and view all the answers

Which of these is NOT a characteristic of fish?

<p>Terrestrial and adapted for land-based life (A)</p> Signup and view all the answers

Approximately how many new fish species are described each year?

<p>200 (A)</p> Signup and view all the answers

What is the estimated percentage of fish species in the Amazon river basin that have been collected and described?

<p>33% (A)</p> Signup and view all the answers

When did the first true vertebrates appear in the fossil record?

<p>530 million years ago (C)</p> Signup and view all the answers

Which of the following was NOT a characteristic of the first fish that appeared over 500 million years ago?

<p>Developed heavy bony armor and roamed in this form for over 20 million years (C)</p> Signup and view all the answers

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