________ is the ability to maintain a relatively constant internal environment
Fill in the blank(s) with correct word
Homeostasis
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The tRNA shown in the figure above has its end projecting beyond its end. What will occur at this end?
A) The codon and anticodon complement one another. B) The amino acid binds covalently. C) The excess nucleotides (ACCA) will be cleaved off at the ribosome. D) The small and large subunits of the ribosome will attach to it. E) The cap of the mRNA will become covalently bound.
Which of the following correctly pairs a germ layer with the cells that will form from it?
A. ectoderm: inner layer of the skin, muscles B. mesoderm: inner layer of the skin, muscles C. endoderm: epithelial and pigment cells of the skin D. ectoderm: lining of the digestive tract and lungs E. mesoderm: lining of the digestive tract and lungs
Which of the following comparisons between the moss life cycle and fern life cycle are valid?
_____ Mosses have flagellated sperm that need water the reach the female gamete, while the sperm of ferns are unflagellated and are not dependent on water. _____ The sporophyte generation is smaller than the gametophyte generation in mosses, but the sporophyte generation is much larger than the gametophyte generation in ferns. _____ The spores are produced in capsules on stalks in mosses but in small structures called sori on the underside of leaves in ferns. _____ The gametes are produced in gametangia in mosses but in specialized structures on the underside of leaves in ferns. _____ Both kinds of plants depend on wind for dispersal of spores.
The determining function that drives share of accepted job offers for a company is given by the following equation: AcceptedOfferst = ?0 + ?1StartingSalaryt + ?2EconomicClimatet + Ut, where the unit of observation is particular month (t). Suppose one wanted to use the national unemployment rate (unemploymentt) as a proxy for EconomicClimate (i.e., ran the above regression replacing the UnemploymentRate with EconomicClimate). How should we interpret the estimated coefficient on the UnemploymentRate (i.e., the proxy variable)?
A. A good estimate for ?2 in the above determining function. B. A good estimate for ?1 in the above determining function. C. A good estimate for ?1 + ?2 in the above determining function. D. None of the answers is correct.