Nitrogen is fixed by soil bacteria and is then incorporated into plant biomass and eventually into the food chain. What process(es) complete the global nitrogen cycle?
What will be an ideal response?
Decomposers turn the nitrogen in dead plant and animal bodies into soluble forms of nitrogen in soil or water; denitrifying organisms convert these soluble inorganic forms of nitrogen into gaseous forms of nitrogen that enter the atmosphere.
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Which specific autoimmune disease involves neuroglial cells?
a. cerebral palsy b. rheumatoid arthritis c. Grave’s disease d. multiple sclerosis e. lupus
What is the only known eusocial mammal?
A. naked mole rats B. Belding's ground squirrels C. humans D. honeybees E. prairie dogs
Homeostasis
A) is the maintenance of a relatively constant internal state. B) results from hormone imbalance. C) occurs when the external environment changes to match the internal environment. D) is the way the internal environment influences the external environment.
All forms of diabetes mellitus involve defects in the production or function of insulin. The result of this defect in insulin is ________
A) a lack of sodium in the bloodstream B) a buildup of glucose in the bloodstream C) a lack of glucose in the bloodstream D) a buildup of sodium in the bloodstream