Algae - Wikipedia
Algae (UK: / ˈ æ l ɡ iː / AL-ghee, US: / ˈ æ l dʒ iː / AL-jee; [3] sg.: alga / ˈ æ l ɡ ə / AL-gə) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for a polyphyletic grouping that includes species from multiple distinct clades.
Algae | Definition, Characteristics, Classification, Examples, & Facts ...
2024年8月20日 · algae, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista. Algae have many types of life cycles, and they range in size from microscopic Micromonas species to giant kelps that reach 60 metres (200 feet) in length.
Algae - Phycology, Photosynthesis, Taxonomy | Britannica
2024年8月20日 · The classes are distinguished by the structure of flagellate cells (e.g., scales, angle of flagellar insertion, microtubular roots, and striated roots), the nuclear division process (mitosis), the cytoplasmic division process (cytokinesis), and the cell covering.
ALGAE - Smithsonian National Museum of Natural History
Green algae have chlorophylls a and b and store starch as a food reserve inside their plastids. Most green algae have firm cell walls composed of cellulose along with other polysaccharides and proteins.
Algae - Encyclopedia of Life
Algae. The highly varied group of organisms we call "algae" includes terrestrial algae, snow algae, seaweeds, phytoplankton, and "pond scums" (which are composed of stringy masses of cyanobacteria, as well as true algae such as Spirogyra). Algae are morphologically simple, chlorophyll-containing organisms that range from microscopic and ...
Green algae | Photosynthesis, Chloroplasts, Autotrophs | Britannica
green algae, members of the division Chlorophyta, comprising between 9,000 and 12,000 species. The photosynthetic pigments (chlorophylls a and b, carotene, and xanthophyll) are in the same proportions as those in higher plants. The typical green algal cell, which can be motile or nonmotile, has a central vacuole, pigments contained in plastids ...
The Algae and Their (Imperfect!) Classifications
Fritsch (1935) proposed a broad classification of the algae and defined them as, “Unless purely artificial limits are drawn, the designation of an alga must involve all holophytic organisms (as well as their colourless derivatives) that fail to reach the level of differentiation of archegonite plants” (reproduced in South and Whittick 1987, p. 5).
Classification of Algae - SpringerLink
G. E. Papenfuss proposed algal classification based on phylogenetic relationship. He recognized 7 division and 12 classes as described in the following table. The blue green algae were kept together in a separate phylum Schizophya along with bacteria.
An introduction to algal phylogeny and phylogenetic methods
Abstract. The algae are an assemblage of morphologically diverse, photosynthetic protists that are ubiquitous in distribution. The understanding of algal phylogeny has been revolutionized with molecular evolutionary methods. These analyses have shown that the algae are of a polyphyletic origin and diverge nearly simultaneously from each other ...
1.6: Algae (Protista Phylum) - Biology LibreTexts
How would algae contribute to the future of food? There is an increasing interest in seaweed, a common name for macro marine algae such as brown, red, and green algae. Moreover, algae may be able to help to future food security since they are …
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