Algae - Encyclopedia. com 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
Green Algae - Encyclopedia. com Chlorophyta (green algae) Division of algae which are typically green in colour In common with higher land plants, green algae include chlorophylls a and b among their principal pigments, have cellulose as the main constituent of cell walls, and form food reserves of starch Consequently it is believed that the ancestors of land plants must
Blue-green Algae - Encyclopedia. com Blue-green algae [1] Blue-green algae [2] are actually a type of bacteria that is known as cyanobacteria In their aquatic habitat, cyanobacteria are equipped to use the sun's energy to manufacture their own food through photosynthesis
Protista - Encyclopedia. com The golden algae (Chrysophyta) and brown algae (Phaeophyta) include many familiar seaweeds easily found on rocky coasts Kelp is a gigantic marine brown alga ( Macrocystus ) that grows up to 30 meters (100 feet) long and forms dense "forests" in some coastal waters
Pyrrophyta - Encyclopedia. com Cryptomonads themselves are the evolutionary result of endosymbiosis, and are chimeric species that evolved from ancestral red algae and a non-photosynthetic host that retained the red alga nucleus under the form of a bead-like nucleomorph chromosome The highly condensed chromosome of this Pyrrophyta consists of three different bead-like
Dinoflagellata - Encyclopedia. com dinoflagellates A division (Dinoflagellata) of protists that are heterotrophs but closely allied to brown algae and diatoms (they are sometimes classified as algae) Many have brown or yellow chromoplasts containing xanthophyll and chlorophylls a and c; others are colourless Typically, dinoflagellates have two flagella, one propelling water to
Diatoms - Encyclopedia. com Ecologically vital, algae account for roughly half of photosynthetic production of organic material on Earth in both freshwater and marine environments Algae exist either as single cells or as multicellular organizations Diatoms are microscopic, single-celled algae that have intricate glass-like outer cell walls partially composed of silicon
Protozoa - Encyclopedia. com The amoeba, for example, is capable of detecting chemicals given off by potential food particles such as diatoms, algae, bacteria, or other protozoa As the cell wall has no definite shape, the cytoplasm can extrude to form pseudopodia (Greek: pseudes , false; pous , foot) in various sizes and at any point of the cell surface
Three-Toed Tree Sloths (Bradypodidae) | Encyclopedia. com The underfur is short and fine The coarse very thick outer fur is grooved along its length, providing attachment for two species of blue-green algae Along with sebaceous secretions from the sloth, excretions from the algae are food for adults of Cryptoses choloepi, a species of pyralid moth Adult moths reach densities of up to 132 per sloth