Bio Exam #3
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Ammonia, Urea, Uric acid
Ammonia is a small, toxic molecule (NH3) produced by nitrogen ﬁxation or as a metabolic waste product of protein and nucleic acid metabolism
Urea is a soluble nitrogenous waste produced in the liver by a metabolic cycle that combines am- monia with carbon dioxide.
Uric Acid is a product of protein and purine metab- olism and the major nitrogenous waste prod- uct of insects, land snails, and many reptiles. Uric acid is relatively nontoxic and largely insoluble.
A symbiotic fungus whose hyphae grow through the cell wall of plant roots and extend into the root cell (enclosed in tubes formed by invagination of the root cell plasma membrane).
A structural polysaccharide, con- sisting of amino sugar monomers, found in many fungal cell walls and in the exoskeletons of all arthropods.
the moulting of the cuticula in arthropods and related groups
Ectothermic vs Endothermic
Ectothermic is referring to organisms for which external sources provide most of the heat for temperature regulation.
Endothermic is referring to organisms that are warmed by heat generated by their own metabolism. This heat usually maintains a relatively stable body temperature higher than that of the external environment.
A unique excretory organ of insects that empties into the digestive tract, removes nitrogenous wastes from the hemolymph, and functions in osmoregulation.
mutualistic association of plant roots and fungus.
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