Classification of Life
Biology Chapter 18 - Classification
Terms
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- Blastopore
- indent in the blastula becomes the anus in the animal phyla
- Analagous Structures
- Structures that evolved independently
- The more ____________ structures between organisms the more closely they're related
- Homologous
- Cladistics
- New System of classification uses shared derived characteristics (Eg.Feathers only in the Bird Group)
- Homologus Structures
- Features inherited from a common ancestor
- Embryological development
- The longer the embryos of different organisms remain similar during development the more closely related they are
- Name the Classification Categories.
- Kingdom - Phylum - Class - Order - Family - Genus - Species
- Birds Crocodiles dinosaurs are more related to _______________ than they are to snakes lizards and turtles
- more related
- Blastula
- Early ball of cells
- Phylogenetic Tree
- shows evolutionary relationships among groups of organisms
- Binomial Nomenclature
- 2 word system of naming and identifying organisms. It was used by Linnaeus and is in Latin.
- Chromosomes and Macromolecules
- Taxonomists look at DNA, RNA, and Protiens, and compare their karyotypes
- Fossil Record
- Fossilized organisms can show relationships between groups, but this is not always complete evidence because many orgaisms were not fossilized.
- Molecular Clock Model
- Used to estimate relationships by differences in amino acids sequence
- Morphology
- Anatomy and Structures of an organism
- Systematics
- Uses different lines of evidence to construct a phylogentics tree which groups organisms according to their evolution
- Name 3 Reasons why Scientific Names are better than common names
- 1)They are universal, used by scientists all over the world 2) They are specific and eliminate confusion (Starfish, Seahorse) 3) Common names can represent different species (Raspberries, sunfish)
- Who used structural similatrities to group organisms so they could be easily identified? He also came up with classification categories
- Carolus Linnaeus