Algae Algae (singular: alga) are photosynthetic, eukaryotic organisms that do not develop multicellular sex organs. Algae can be unicellular, or they may be large, multicellular organisms. Algae can occur in salt or fresh waters, or on the surfaces of moist soil or rocks . The multicellular algae develop specialized tissues, but they lack the true stems, leaves, or roots of the more complex ...
green algae Large group of marine and freshwater algae (phylum Chlorophyta). They are distinct from other algae by virtue of possessing cup-shaped chloroplasts that contain chlorophyll b, and by producing cells with flagella at some stage in their lives. Green algae range in size from microscopic single-cell types to large, complex seaweeds.
Cyanobacteria Cyanobacteria (blue-green algae [1]) are microorganisms that structurally resemble bacteria (they lack a nucleus and organelles ). However, unlike other bacteria, cyanobacteria contain chlorophyll a and conduct oxygenic photosynthesis.
Some species of brown algae have an air bladder to keep the thallus floating at the surface of the water, where more light is available for photosynthesis. Brown algae store their energy as laminarin, a carbohydrate. The phylum Chlorophyta is known as the green algae. This phylum is the most diverse of all the algae, with greater than 7,000 ...
Protista Background Classification Protozoa Algae Slime molds and water molds Disease-causing protists Beneficial protists Resources The kingdom Protista is the most diverse of all of the eukaryotic kingdoms. It is certainly not monophyletic and its members really only share the fact that they have a simple structure, without any obvious tissues or organs. There are more than 200,000 known ...
Photosynthesis Photosynthesis is the biological conversion of light energy into chemical energy. This occurs in green plants, algae, and photosynthetic bacteria .
D. pulex eats algae and such small zooplankton as protozoans or rotifers. In turn, water fleas are consumed by small fishes and predatory insects. reproductive biology D. pulex reproduces asexually during the spring and early summer. Later in the season, some asexually-produced eggs become males, a change that allows sexual reproduction to begin.
A few species of turbellarians have a relationship with the algae that live in them in which the algae supply the worm with carbohydrates and fats and the worm supplies the algae with nitrogen waste products and a safe haven.