Plant-Like Protists: algae

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Diatoms space single-celled algae. Other forms of algae space multicellular.

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Why room algae considered plant-like? The key reason is the they save chloroplasts and produce food v photosynthesis. However, lock lack countless other structures of true plants. For example, algae perform not have roots, stems, or leaves. Part algae additionally differ from tree in being motile. They might move through pseudopods or flagella. Although no plants themselves, birds were more than likely the ancestors of plants.

Ecology that Algae

Algae play far-ranging roles together producers in aquatic ecosystems. Microscopic forms live suspended in the water column. They room the key component the phytoplankton. Together such, they contribute to the food basic of most naval ecosystems.

Multicellular seaweeds dubbed kelp may grow as big as trees. They room the food basic of ecosystems called kelp forests (see Figure below). Kelp woodlands are discovered throughout the s in temperate and also arctic climates. They are highly fertile ecosystems.


Kelp Forest. This kelp forest supports a big community of countless other species of organisms.

Classification of Algae

Types of algae encompass red and green algae, and also euglenids, and dinoflagellates (see Table below because that examples). Researchers think the red and green algae developed from endosymhistoricsweetsballroom.comtic relationships v cyanobacteria. Your chloroplasts have actually two membranes since the cell membranes of the cyanobacteria became extr plasma membrane of the chloroplasts. Researchers think the euglenids and also dinoflagellates developed later, native endosymhistoricsweetsballroom.comtic relationships through green and red algae. This is why their chloroplasts have actually three membranes. Differences in the varieties of chlorophyll in the four types of algae also support the hypothesized evolution relationships.

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type of Algae beginning of Chloroplast type of chloroplast

Red algae


cyanobacteria two membranes, chlorophyll choose the majority of cyanobacteria

Green algae


cyanobacteria two membranes, chlorophyll favor a minority of cyanobacteria



green algae three membranes, chlorophyll like environment-friendly algae