- Algae - Encyclopedia. com
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 | Encyclopedia. com
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
- Blue-Green Algae - Encyclopedia. com
Blue- green algae Blue- green algae 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 The moniker blue-green algae came about because of the color, which was a by-product of the photosynthetic activity of the microbes, and their discovery as a algal
- Cyanobacteria - Encyclopedia. com
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
- Pyrrophyta - Encyclopedia. com
Cryptomonads for instance, are considered red-brownish algae of Cryptomonadida Order by botanists, and protozoans of Cryptophycea Class by zoologists This controversy is due to the unusual characteristics of these two phyla, sharing features with both plants and animals
- Evolution of Plants - Encyclopedia. com
Evolution of Plants Plants, descended from aquatic green algal ancestors, first appeared on land more than 450 million years ago during or prior to the Ordovician period This event preceded the colonization of land by four-footed animals (tetrapods), which occurred considerably later in the Devonian period (408 to 360 million years ago) Understanding the origin of plants is important because
- 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 the rear and providing forward motion, attached
- Diatoms - Encyclopedia. com
Diatoms Algae are a very diverse group of simple, nucleated, plant-like aquatic organisms that are primary producers Primary producers are able to utilize photosynthesis to create organic molecules from sunlight, water , and carbon dioxide Ecologically vital, algae account for roughly half of photosynthetic production of organic material on earth in both freshwater and marine environments
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