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Biology Maranatha
martes, 11 de noviembre de 2008
LEVELS OF CLASSIFICATION
There are
seven levels
of classification categories for organisms. The most general is the kingdom and the most specific is the species.
There are about
35 Phylum
in animalia kingdom and more that
1.5 million
recognized
species
.
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Marsupial
Pouch ti carry young through early infancy
Monotremes
Egg laying mammals
Architeuthis dux (Giant Squid)
Chepalopods. can have a body of 4 meters long with tentacles over 9 metres long.
Giant Pacific Octopus (Octopus hongkingensis)
Can measure 9.7 m across and weigth more than 272 kg
Phylum Annelida
Segmented worms, coelomates, three tissue layers.
Phylum Nematoda
Unsegmented worms, two openings (mouth and anus), three tissue layers, and a pseudocoelom
Phylum Platyhelminthes
Flatworms: soft, flattened, 3 tissue layers, cephalization, bilateral symmetry and acoelomates.
Sponges
Multicellular, heterotrophic, have no cell walls and contain a few specialized cells.
Four basic types of animal tissues
Tissue is a group of specialized cells that have a common structure and a common function.
Temperate Woodland and Shrubland
semiarid climate, hot, dry summers, poor soils, periodic fires.
Boreal Forest
evergreen, coniferous trees, winter bitterly cold, northen hemisphere.
Temperate forest
Coniferous and deciduos trees, cold winters, soil rich in humus.
Layers of Growth
Canopy layer, understory, shrub layer, herb layer, and ground layer
Temperate Grassland
Grasses, fertil soil, agricultural field
Desert
Dry, low precipitation, variable temperatures, soil rich in mineral
Tundra
Permafrost, high winds, cold temperatures, low precipitation.
Tropical Dry Forest
Warm, alterning wet and dry, deciduos trees.
Tropical Rain Forest
Hot, wet, evergreen trees.
Hydrophytes
Aquatic plant
Apical dominance
Growth at the lateral buds is inhibit by auxins
Xerophyte
Plants able to with stand long dry periods of high temperature
Nitrogen fixation by Rhizobia
www.en.wikipedia.org/wiki/Rhizobia
Plant responses
www.en.wikipedia.org/wiki/Plant_perception_(physiology)
Biology
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