CRASH of Two Species!. Compare these two organisms Komodo DragonCoelacanth fish.

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Presentation transcript:

CRASH of Two Species!

Compare these two organisms Komodo DragonCoelacanth fish

Compare these 3 to the previous slide Hissing CockroachHorseshoe Crab And…

They are all Living Fossils!!

WATCH THE VIDEO

Answer these questions What are some adaptations that have helped the horseshoe crab to survive for 350 million years? (Its hard shell deters most predators; copper-based blue blood clots if bacteria tries to enter its body; compound eyes on top of shell to see the cycles of the moon; each crab lays thousands of eggs.) How does the red knot prepare for its long migration from South America to the Arctic? (In South America, red knots feed for days on end to bulk up their bodies; they molt and grow new feathers that enhance their flying abilities. Then, further north, in Delaware Bay, they eat as many as 18,000 horseshoe crab eggs a day on the beach.) What are some of the reasons why the horseshoe crab population is declining? (Fishermen were overharvesting horseshoe crabs to use as bait.) Do you think the red knot would survive if the horseshoe crab became extinct? Why or why not?