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AMPHIBIANS

AMPHIBIANS. Ms. Bridgeland 5 th Grade. Are Amphibians a CLASS or a PHYLYM?. Amphibians : one of the 5 classes of Vertebrates Reminder: What are the other 4 classes of Vertebrates?. Objective : Describe amphibian characteristics and examine how adult amphibians are adapted for life on land. .

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AMPHIBIANS

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  1. AMPHIBIANS Ms. Bridgeland 5th Grade

  2. Are Amphibians a CLASS or a PHYLYM?

  3. Amphibians: one of the 5 classes of VertebratesReminder: What are the other 4 classes of Vertebrates?

  4. Objective: Describe amphibian characteristics and examine how adult amphibians are adapted for life on land.

  5. Why do you think the word “Amphibian” means “double-life?”

  6. Amphibian: “Double – life” • They begin their lives in water and spend their adulthood on land • To reproduce (have babies), they return to water

  7. What are the two major groups of amphibians?

  8. 2 Major Groups of Amphibians • Salamanders: • Frogs/Toads:

  9. How can you tell the difference between salamanders and frogs/toads? • Salamanders have a tail even when they are adults • Frog/toads lose their tails before they become adults

  10. “What are the differences between FROGS and TOADS?”

  11. Frogs Toads

  12. FROGS: • Need to live near water • Have 2 bulging eyes • Strong, long, webbed hind feet that are adapted for leaping and swimming • Strong and slimy skin (like very moist environments) • Will take long jumps • Like to lay eggs in clusters • Found on every continent except Antarctica • More than 400 species • Have a lot of PREDATORS

  13. TOADS • Can live further away from water • Lower, football-shaped eyes • Stubby bodies with short hind legs (for walking instead of hopping) • Warty and drier skin • Lay eggs in long chains • Will run or take small hops • Can be found worldwide except for Madagascar, the polar regions, and Polynesia • More than 300 species • Do NOT have a lot of predators

  14. Amphibian Reproduction • For all amphibians, Fertilized eggs develop in water

  15. What is unique/special about Amphibian eggs?

  16. What is special about amphibian eggs is that they have a protective jelly that coats the egg instead of a shell

  17. Amphibian Eggs

  18. How Amphibians Reproduce There are 6 stages in the life cycle of an Amphibian: Here is what a frog looks like in some of the stages

  19. Stage 1: Adult frogs lay eggs in water

  20. Stage 2: Fertilized Eggs • Male frogs fertilize the eggs, which lie in water for a few days

  21. Stage 3: Larvae • After a few days, larvae wriggle out of a jelly that coats the egg and begin a free-swimming, fishlike life • Larvae of a frog or toad is called a _________

  22. As they grow, larvae undergo a ______________________?

  23. Metamorphosis • A process where an animal develops after birth or hatching, involving a sudden change in the animal’s structure

  24. Stage 4: Larvae develops hind legs

  25. Stage 5: Front legs develop but frog still has tail

  26. Stage 6: Frog loses tail and becomes a mature adult

  27. Metamorphosis Cycle

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