Ch. 17 Classification of Organisms
Classification hierarchy of organisms (from biggest to smallest)
Kingdoms, phyla/divisions, classes, orders, family, genus, species
Short, hairlike cytoplasmic projections that line the cell membrane
Cilia
Multicellular or unicellular
Multicellular
Phylum name
Porifera
2 types of body plans
Polyp and medusa
Who created the 7 levels of the hiearchy system?
Carolus Linnaeus
A form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size
Binary fission
__% invertebrates and __% vertebrates
95; 5
Describes an organism that remains attached to a surface for its entire life and does not move
Cnidocyte (Definition)
A stinging cell of a cnidarian
How are plants classified?
By their type of stem
Amoeba-like movement; the movement of a cell by the formation of pseudopods
Amoeboid movement
Function of circulatory system
transport of oxygen and nutrients; removal of CO2 (carbon dioxide) and waste
A method of feeding in which the animal traps organic material that is floating in the surrounding water
Filter feeding
Ciliated larva
Planula
Cladistics (Definition)
A phylogenetic classification system that uses shared derived characters and ancestry as the sole criterion for grouping taxa
Common name of Phylum Protozoa
Protozoa, sarcodines, and mycetozoans
Firm, flexible rod of tissue located on the dorsal surface of the body; becomes the backbone
Notochord
Water in a sponge enter through the ___ and exit through the __.
ostia; osculum
Examples in the Class Hydrozoa
Obelia, Portuguese man of war, and hydra
1. All organisms inherited their rRNA from a common ancestor.
2. All living things are related by ancestry into one of the 3 domains.
3. Members of domain Archea have just recently been discovered/identified and studied.
Examples (or Representative genera) of Phylum Bacillariophyta
Cocconeis and Bacillaria
3 germ layers
Ectoderm (outer layer); mesoderm (middle layer); endoderm (innermost layer)
Hermaphrodite
An organism that has both male and female reproductive organ
The name Anthozoa means ___.
Flower animals