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While wading in the ocean, you look down into the water and notice an umbrella-shaped, translucent animal. It swims by pulsing its body, and long tentacles trail behind it. One of them brushes your leg. Ouch! You feel a burning sensation where it touched you.   To what phylum does this creature probably belong?

Which of the following is true based on the data below?   Amphibians Ray-finned Fishes Lobe-finned fishes Lampreys Reptiles Mammals Sharks and Rays Jaws 1 1 1 0 1 1 1 Amniotic Egg 0 0 0 0 1 1 0 Legs 1 0 0 0 1 1 0 Lobed fins 1 0 1 0 1 1 0 Milk Production 0 0 0 0 0 1 0 Lungs 1 1 1 0 1 1 0  

What is/are the threat(s) to coral reefs?

Which of the following structures does this organism possess?  

This fin labeled is a ______________________ fin.

This dogfish shark pup was nourished by a yolk sac, but not a placenta in the mother’s body.  Therefore, this species is  

The structure labeled is part of the

Intracellular digestion is ___________________________ and is found in  ___________.

These organisms are

Which of the following characteristics do chondrichthyes (sharks, skates and rays) and osteichthyes (bony fish) share?