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.