Extracellular calcium ion levels
A. are decreased by parathyroid hormone secretion.
B. are increased by calcitonin secretion.
C. are increased by vitamin D.
D. are increased by increased osteoblast activity.
E. All of these are correct statements.
Ans: C. are increased by vitamin D.
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In reproductive cloning, when a clone grows from a single cell to a full organism, the development happens through ________.
A. mitosis B. cloning C. surrogate growth D. meiosis
How did researchers determine the proteins involved in the secretory pathway?
a. interfering with the translation of proteins and examining the cell's ability to transport fluorescently tagged proteins b. adding a detergent to the cells to lyse the membranes and examining transport of fluorescently tagged proteins c. genetically engineering mutations in genes and measuring changes in Golgi complex morphology d. treating cells with inhibitors of the secretory pathway and measuring changes in Golgi complex morphology e. altering the pH of the media to selectively regulate different enzymes and measuring changes in Golgi complex morphology
Soil is formed from the layer of unconsolidated debris overlaying hard, unweathered rock referred to as
A) regolith. B) topsoil. C) till. D) loam.
Transcription in eukaryotes is generally influenced by enhancers, just as in prokaryotes
Indicate whether the statement is true or false