Biology notes on the "Phyla of Protists." This Phyla includes algea, protists, sponges, etc.

Phyla of Protists

*Move drug abuse pseudopodia

*Have prongy shells made of silica

*photosynthetic protists; can be multicellular

*Move using flagella

*Move using cilia

*Fungus like protists

*Form resistant spores

An interesting group of protists consists of amoebas and forams. These protists ar distinguished by their unique form of locomotion, in which they use extensions of cytoplasm. Amoebas and forams argon unicellular heterotrophs.

Amoebas, members of the phylum Rhizopoda, are protists that live in neat and salt waters and are especially abundant in soil. Because there is no cell wall or flagella, it is passing flexible. It moves through its environment using extensions of cytoplasm called pseudopodia, from the Greek oral communication pseudo, meaning false, and podium, meaning foot. Meiosis and sexual breeding do not occur in amoebas. They reproduce by fission, alone dividing into two new cells.

Forams, members of the phylum Foraminifera, are marine protists that live in sand or attached to other organisms or rocks. Forams are characterized by their porous shells, called tests. Tests usually have many house arrayed in a spiral shape resembling a tiny snail and consisting of organic material that contains grains of calcium carbonate. Long, slim projections of cytoplasm extend through the pores in the tests to aid in swimming and in capturing prey.

Diatoms, members of the phylum Baccillariophyta, are photosynthetic, unicellular protists with unique double shells made of silica. Their shells are like small boxes with lids, one half(a) fitting inside the other. Abundant in oceans and lakes, diatoms are grand food producers. Diatoms can have one of two types of residual: radial (like a wheel) or bilateral (two-sided). Sexual reproduction in diatoms is rare.

The kingdom Protista also contains some of the fast-breaking growing and most photosynthetically productive organisms-the algae. The three kinds of algae are green algae, red algae, and...

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