BIO 121 Lecture Notes - Lecture 2: Protist, Plant, Eukaryote
Document Summary
Bio 121 week 1 lecture 2. All life is composed of one of two possible cell types: eukaryotic and prokaryotic. Prokaryotic cells have dna too, but not enclosed in a nucleus. Ecosystem all living and nonliving organisms in the area: desert, swamp, rainforest, tundra, lake. Ecosystem processes: energy flow, nutrient cycling. Energy (sun: solar energy producers (plants/any photosynthetic organisms) consumers . Taxonomy established by: carolus linnaeus in mid 1700s. Naming all known species and categorizing into inclusive groups. A common language allows unambiguous communication among all languages: species name (binomial) Hierarchal classification: biologists discovered/named ~ 1. 8 million species, hierarchal classification categorizes this species diversity into more inclusive groups, the outline (hierarchal) form is meant to represent relationships among organisms. The domain that contains all eukaryotic organisms. There are 4+ kingdoms within this domain: animalia. Multicellular heterotrophs that consume food by ingestion: fungi. Multicellular heterotrophs that consume food by absorption: plantae. Multicellular autotrophs that produce food by photosynthesis: protista .
