BIOL 123 Lecture Notes - Lecture 18: Micronucleus, Osmotrophy, Microsporidia
Document Summary
Ciliates reproduce asexually via mitosis and forming cysts. Can reproduce sexually by a process known as conjugation. One or more smaller micronuclei and a single large macronucleus. Macronuclei contain many copies of the genome serve as the source of info for the cell function. Both micro and macro nuclei divide during asexual mitosis. The micronuclei don"t get expressed in growth but instead transmit genome to the next generation through conjugation. Parasitic protists may use alternatie hosts for different life stages. Kingdom fungi is part of the supergroup opisthokonta. Monophyletic group of more than 100,000 species. Rigid chitin-rich cell walls are a key feature. Enables most fungi to resist high osmotic pressure that results from when they feed by absorbing small organic molecules osmotrophy. Single celled fungi that parasiteize animal cells. Secret enzymes that break down complex organic materials and absorb the resulting small organic food molecules. Distinctive body composed of individual microscopic, branched filaments (hyphae)
