blue green algae 是細菌定海藻??

blue green algae 是細菌定海藻??
1.blue green algae 是細菌定海藻定其他??
2.如果是細菌，點解書會寫bacteria and blue green algae??
3. algae 同seaweed 有咩唔同??以下句子填邊個??
Some ______ are edible???
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1.blue green algae 是細菌
Cyanobacteria

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?Cyanobacteria


圖片參考：http://upload.wikimedia.org/wikipedia/commons/thumb/6/64/Anabaena_sperica.jpeg/200px-Anabaena_sperica.jpeg

Anabaena sphaerica (Nostocales)

Scientific classification





Kingdom:
Bacteria


Division:
Cyanobacteria



Orders


The taxonomy of the
Cyanobacteria is currently
under revision. see [1]

Cyanobacteria (Greek: κυανόs (kyanós) = blue + bacterium) is a phylum (or "division") of Bacteria that obtain their energy through photosynthesis. They are often referred to as blue-green algae. The description is primarily used to reflect their appearance and ecological role rather than their evolutionary lineage. Fossil traces of cyanobacteria have been found from around 3.8 billion years ago (b.y.a.). See: Stromatolite. As soon as these blue-green bacteria evolved, they became the dominant metabolism for producing fixed carbon in the form of sugars from carbon dioxide. Cyanobacteria are now one of the largest and most important groups of bacteria on earth.







2.如果是細菌，點解書會寫bacteria and blue green algae??
因為書的作者不想一般人唔記得　blue green algae　是 bacteria。

3. algae 同　seaweed 有咩唔同??

seaweed 不等於 algae，因為 seaweed (一般大眾稱呼) 是 algae (生物學上較微觀的稱呼) 的一種。
Seaweed

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圖片參考：http://upload.wikimedia.org/wikipedia/en/thumb/3/38/Seaweed_600.jpg/250px-Seaweed_600.jpg



圖片參考：http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png
Seaweed-covered rocks in the UK

For the rock musician, see; Seaweed (musician)
Biologists, specifically marine biologists, consider seaweed to be any of a large number of marine benthic algae that are multicellular, macrothallic, and thus differentiated from most algae that tend to be microscopic in size [1]. Many phycologists prefer the term "marine macroalgae" over "seaweeds". Seaweeds are classified into brown (Phaeophyta), red (Rhodophyta) and green algae (Chlorophyta) based on their pigment composition. There are a few species of cyanobacteria however, that may also be categorized as seaweeds. Seaweeds are not to be confused either with plants like seagrasses (which are vascular plants), or actual weeds in the sense of nuisance blooms or accumulations of unwanted species — certainly, seaweeds are natural components of pristine marine ecosystems. (The best definition of "weed" is "A plant in the wrong place").


Some seaweed are edible
因為 edible （可食用）不應配合 algae (生物學上較微觀的稱呼)


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