alga
simple, green chlorophyll-bearing plants; plural algae
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Alga
The algae (singular is alga) comprise several different groups of living things that produce energy through photosynthesis. They are generally regarded as simple plants, and some are related to the higher plants.
alga pl. algae
(al-gah, al-jee)
A photosynthetic, plantlike protist.
alkaline ...
alga A photosynthetic protist containing plastids. Any of several groups of autotrophs that lack the structural features (true leaves, roots, and stems) of the higher plants.
Red alga
These groups have chloroplasts containing chlorophylls a and c, and phycobilins. The latter chlorophyll type is not known from any prokaryotes or primary chloroplasts, but genetic similarities with the red algae suggest a relationship there.
the alga loses its flagella and cytoskeleton;
the host loses its feeding apparatus;
the host switches from heterotrophic to autotrophic nutrition (photosynthesis);
the host becomes capable of phototaxis.
noun, singular: alga
A group of aquatic, photosynthetic, eukaryotic organisms ranging from unicellular to multicellular forms, and generally possess chlorophyll but lack true roots, stems and leaves characteristic of terrestrial plants.
Fucus is a brown alga differentiated into a floating "blade", flotation bladder, stalk (or stipe) and basal holdfast.
Chlorella vulgaris is a common unicellular green alga that is used as a "lab rat" in labs throughout the world. We've grown the same strain of it for thousands of generations on agar and in liquid culture without it losing its unicellular morphology.
Lichens are a symbiosis between a photosynthetic organism (an alga or cyanobacterium) and a fungus (either an ascomycete or a basidiomycete). Lichen often live in marginal environments and often grow only one or two centimeters per year.
The organelles of this flagellated alga are clear, such as the red eyespot, the chloroplasts, and the flagella. Unrestricted, Euglena moves in a rotating motion using its flagella.
holdfast -- Anchoring base of an alga.
homology -- Two structures are considered homologous when they are inherited from a common ancestor which possessed the structure.
Chlamydomonas: The unicellular green alga that is probably the closest living organism to the ancestor of green plants. It reproduces both asexually and sexually (two mating types).
≈10μm (amoeba) - 1m (Laminaria / large brown alga)
Fungi
Cell structure: eukaryotes, multicellular and unicellular (yeast)
Cell wall: chitin
Nutrition: heterotrophic / saprotrophic decomposers or parasitic
Genus Penicillium ...
Macrophyte. An individual alga large enough to be seen easily with the unaided eye
Macroplankton. Planktonic organisms that are 200-2,000 micrometers in size.
He also studied the unicellular green alga Chlamydomonas reinhardtii, cloning and characterizing genes and mRNAs as cDNAs whose expression increases when the cells replace their flagella, ...
 See also: Plant, Organ, Cells, Life, Cell
  
|
RSS
