Water

• H₂0
• Universal Solvent
• Polar Molecule
• Hydrogen and Oxygen are in a covalent bond ("shares electrons")

Surfactant

• prokaryote
• single cell
• reproduce asexually
• round (coccus), rod (bacillus), and spiral (spirillum)

no nucleus (still has DNA, but no membrane)

Arcaeabacteria

• prokaryote 
• single cell
• reproduce asexually
• ancient
• can live in extreme enviroments

• eukaryote
• single cell
• can live in colonies, but still independent
• both heterotrophs and autotrophs

Heterotroph

• multicell
• heterotroph

• multi cell
• autotroph

• multi cell 
• heterotroph

 invertebrates (no spine)/vertebrates (has spine)

porifera, chidarian, platyhelminthes, nematodes, mollusks, ammelids

• Sponges
• Pores

• incomplete digestive system
• jellyfish, coral

Complete digestive system

Has an "in" and an "out"

Food goes in one way and out through another

Can keep nutrients from food

Does not have a seperate "in" and "out"

Food goes in the same place waste goes out.

Doesn't keep all nutrients from food (some fresh food pushed out along with waste)

• incomplete digestive system
• flatworms

• Complete digestive system

• clams, squids, octupus, snails

Ammelids

• Complete digestive system
• Earthworms, segmented worms

• ammelid
• have beginning of a primitive heart (5 aortic arches)
• has brain
• strong pharynx and digestive organs
• setae help keep worms from being pulled out of their holes by predators
sexual reproduction
• hermaphrodites -- every worm has both male and female reproductive organs -- both worms are fertilized
• "Nature's plow" --> loosen dirt, allow for water and air to seep into soil
• "Earth's digestive system"
• castings = very porcessed = excellent plant fertilizer