Post on 26-Dec-2015
ALGAE
ALGAE
• 1st plants to appear on earth• Multicellular• Non Vascular
– No true root, stems, leaves, or tubes to transport materials
• No seeds• Must live in or near water• 3 types of algae separated by
pigment color
TYPES OF ALGAE
• Brown Algae• Red Algae• Green Algae
BROWN ALGAE
• Float on or near surface of salt water
• Held up by sacs called Air Bladders
• Provide home for many sea animals
• Ex.– Sargassum, kelp,
rockweed
BROWN ALGAE
• USES:– Food for humans
and livestock– Algins
• used in salad dressings to make them smooth and keep them from separating
• Thickening agent in ice cream and marshmellows
RED ALGAE
• Many different shapes– Clumps of delicate red
threads– Large rounded, flat
sheets– Hard stiff branches
• Usually grow attached to rocks
• Live deeper in the ocean than any other algae
RED ALGAE
• Red pigments transfer the small amount of light to the chlorophyll for photosynthesis
• Uses:– Food– Fertilizer– Carrageenans: in foods,
jellies, lotions– Agar- used in science
labs
GREEN ALGAE
• Live in freshwater• Some live with Fungi
(Lichen)• Some live in the
bodies of worms, sponges , or protists
• Land plants are believed to have evolved from green algae
GREEN ALGAE
• Land plants are believed to have evolved from green algae-have similar life cycles,
pigments and stored food supplies.