In what form do autotrophs pass carbon to heterotrophs?

Which body plan represents an acoelomate?

True or False?  Evaporation can occur over land and over bodies of water?

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. The burning sensation, or sting, was caused when the _________ brushed your skin.

Which of the following best describes this organism?  

The organism indicated is  

All seaweeds are

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  

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?

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