BIO10 Lecture Notes - Symbiogenesis, Rickettsia, Hemicellulose
Document Summary
Biochemical analysis of the cell walls revealed that. Fungal cell wall is basically made up of chitin, the same chemical component of the exoskeleton of animals such as arthropods. Plant cell wall is basically made up of cellulose and hemicellulose. Thus, fungi are more closely related to animals than to plants. In keeping with a phylogenetic approach, we focus on a single branch of the evolutionary tree of life. than to plants. Several lineages including red, brown algae and related groups appear to have originated separately from one another and are independent endosymbiotic associations. The lineage we are interested in is the so called green algae and the land plants. Current evidence indicates that eukaryotes evolved from prokaryotes between 1 and 1. 5 billion years ago. Two theories: infolding theory, endosymbiotic theory. The infolding of the prokaryotic plasma membrane gave rise to eukaryotic organelles. The mitochondria evolved from aerobic bacteria (probably related to the.
