BIOL 1604 Lecture Notes - Lecture 5: Apicomplexa, Ciliate, Malaria
Document Summary
Polyphyletc: analyses of sequences of ribosomal rna have lead to recgnixe more groups and even kingdoms. Some names and categories have been newly created. Current classification is based on: characteristic cellular structures, genomic sequences. Kingdom protista: eukaryotic, unicellular, some colonial, mostly microscopic, asexual and sexual reproduction, no tissues or organs, but different specialized organelles. Mitochondria/chloroplast used to be bacteria and were phagoctosed and then were incorporated into the cell: no nervous system but receptive to certain stimuli. Free living (marine, freshwater, terrestrial), mutualism, commensalism, parasitism, and decomposers represented in the gtoups. Cilia: typically present in large numbers and are relatively short. Flagella: longer than cilia and less numberous. Cilia and flagella have a similar internal structure. Their movement is powered by the release of chemical bond energy in atp. Pseudopodia: temporary protrusions of cytoplasm used for locomotion and ingestion. Lobopodia: rather large blunt extensions of the cell containing endoplasm (fluid state) and ectoplasm (gel state)
