Protoctista Ppt
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The kingdom Protoctista is defined as eukaryotic microorganisms that are neither animals, plants, nor prokaryotes. It includes all nucleated algae, water molds with flagella, slime molds, slime nets, and protozoa. Protoctista show remarkable diversity in cell organization, division, and life cycles. They are grouped together due to shared organelle structure like mitochondrial cristae. Characteristics include being mostly autotrophic via photosynthesis, though some can switch between auto- and heterotrophic states, and inhabiting aquatic environments like salt water, freshwater, moist soil, or other organisms' tissues.
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Protoctista Ppt
- 1. By Ali Paton
- 2. The kingdom Protoctista is defined by exclusion. The members of this kingdom are neither animals, plants, nor prokaryotes. They comprise these eukaryotic microorganisms and their immediate descendants: all nucleated algae. (This includes sea-weeds) Water moulds which have flagella Slime moulds and slime nets Protozoa
- 3. Characteristics of Protoctista It is a very diverse group with remarkable variation in cell organisation, patterns of cell division and life cycle. All algae are autotrophs as they are able to photosynthesise. the other forms are heterotrophic. However some change between being autotrophic and heterotrophic according to condition most have mitochondria They are all thought to have developed from symbiosis (living together of two species to the advantage of both) Protoctista can all be grouped together due to their organelle structure, e.g. the form of the membranous structures (cristae) of the mitochondria. In addition the differences in the pigments used for photosynthesis are used for classification. Protoctista are aquatic. They can make their habitat in salt water, freshwater, in moist soil, or within the moist tissues of others.
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