BIOL 1010 Lecture Notes - Lecture 28: Giardia Lamblia, Foraminifera, Radiolaria
14 May 2017
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Foraminiferans found in both ocean and fresh water. Have porous shells, called tests, made of organic material hardened by calcium carbonate. 90% of foraminiferans have been identified as fossils. Radiolarians produce a mineralized support structure , as an internal skeleton made of silica. Excavata has recently been proposed a clade on the basis of molecular and morphological similarities. Name refers to an excavated feeding groove possessed by some members of the group. Many of these have modified mitochondria , which lacks functional electron transport chains and use anaerobic pathways such a glycolysis to extract energy. Some excavates are parasites, such as giardia intestinalis, which is a common water born parasite that causes diarrhea. 18. 7) unikonts include protists that are closely related to fungi and animals. Unikonta is a controversial grouping, it joins two well established clades: amoebozans which are protists and a second clade that includes animals and fungi.
