Do Now: • Why is photosynthesis important to the intertidal zone?
http://www.youtube.com/watch?v=8SgnnV8nV9g • 3.5 till http://www.youtube.com/watch?v=7hUNBhRiKCI
Origin of UNIVERSE: Big Bang Theory: • Origin of EARTH (4.5 Billion Years Ago) ACCRETION of Dust/Debris into suns, planets, moons etc. http://www.youtube.com/watch?v=zDQzKTedGNE
Origin of OCEAN: Water in Volcanic Gases spewing out – When Earth was cool enough, it began to accumulate into 5 interconnected BASINS on earth’s crust (Pacific, Atlantic, Indian, Arctic, Southern) • Name OCEAN – Means “Big River”
850 mya • Origin of ATMOSPHERE: Fossil Evidence of CYANOBACTERIA 3.5bya “Black Scum” on rocks, evenat shoreline today. • Photosynthetic bacteria • Generated oxygen that is in our atmosphere today stromatolite, produced by the activity of ancient cyanobacteria
Photosynthesis: process of making food • Sunlight + 6 CO2 + 6 H2O C6H12O6 (sugar) + 6 O2 • http://www.youtube.com/watch?v=pE82qtKSSH4
Cellular respiration • “Burning” of food to release sun’s energy trapped in it. • C6H12O6 (sugar) + 6 O2 6 CO2 + 6 H2O + Energy.
Kingdom Protista • mostly unicellular organisms that do not fit into the other kingdoms. • Characteristics of Protists • mostly unicellular, some are multicellular (algae) • can be heterotrophic or autotrophic (may or may not use sunlight to produce food) • most live in water (though some live in moist soil or even the human body) • ALL are eukaryotic (have a nucleus) • A protist is any organism that is not a plant, animal or fungus
Diversity of Algae • Millions of algae species but we’ll focus on these • Diatoms • Dinoflagallates • Red Algae • Kelp or brown algae • Green algae
Brown Algae • 1500 species of Brown algae • Mostly marine and include seaweed and kelp • All are multicellular and large • Used in cosmetics, pudding, toothpaste, ice creams
Reg Algae • 4000 species of RED Algae • Most are marine • Smaller than brown algae and are often found at a depth of 200 meters. • used in cosmetics, gelatin capsules and some cheeses
Green algae • 7000 diverse species • Biologist reason that green algae give rise to land plants.
Dinoflagellates • Unicellular/flagella to help them move through the water. • They are the cause of Red Tide, when there is an outburst in population and in turn water becomes red/brown in color. • can produce toxins. Which cause memory loss and other impaired brain functions in humans
One dinoflagellate that has gotten out of control is Pfiesteria. Pfiesteria grows in fertilizer and raw sewage. It has killed a billion fish along the costs of North Carolina, Maryland, and Virginia since 1991.
Diatoms • group of algae • secrete glass shells they make from dissolved silica in water. • Approx. 100,000 species.