Library science
Rise of Islam
a people and a nation 8th edition
the basics
Basic
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The Age of Nation-States
Italian Renaissance
Basics
American History: A Survey: Cotton, Slavery, and the Old South
Cotton, Slavery, and the Old South Trades in the south included sugar, rice, tobacco, and COTTON created substantial wealth in the region Growth without Development The south remained agricultural through the 1860s Began the 19th century with few important cities and little industry. Plantation industry had been dependent on slave labor ?The south grew, but it did not develop.? Decline of the Tobacco Economy Market for Tobacco was notoriously unstable. Prices were subject to frequent depressions. Tobacco rapidly exhausted the land on which it grew. By 1830s many southern farmers were shifting their crops ? notably to wheat. Southern regions of coastal south continued to rely on rice, more stable and lucrative, however required substantial irrigation.
Classification
Lower Invertebrate Phyla Porifera Cnidaria Platyhelmenthes Nematoda Representative Animal Sponges Jellyfish Tapeworms Roundworm Types of Symmetry No Symmetry Radial Symmetry Bilateral Symmetry Bilateral Symmetry Body Plan 2 cell layers Polyp or Medusa Shape; 2 germ layers 3 Germ layers, true organs, anterior end 3 germ layers; non-segmented, covered by cuticle Digestion Filter nutrients through spongocoel Extracellular ? in gastrovascular cavity Digestive Cavity- branched throughout body Complete digestive tract Method of Transport Sessile Contraction of cells controlled by nerve net Cilia Parapodia Method of Gas Exchange Pores Single entrance for transport of nutrients and gases Body cells have direct contact to outside O2
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