Arrange the following in the proper order in which they occur.
1. Binding of ligand to receptor site
2. Dissociation of G protein subunits
3. Diffusion of calcium ions into the cell
1. Binding of ligand to receptor site
2. Dissociation of G protein subunits
3. Diffusion of calcium ions into the cell
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Assuming a cleft chin is dominant, the father’s genotype would be __________
a. Cc b. CC c. cc d. either Cc or cc
Birds are living representatives of the ____ lineage
a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. crocodilia
Which of the following is true regarding some insect tracheal systems?
a. They are associated with the blood circulatory system. b. They excrete body wastes as well as transport gases. c. Their spiracles can become clogged by spraying them with oil. d. The tracheal tubes are continually open in large terrestrial insects. e. They contain respiratory pigments to enhance oxygen transport.
What are the three main elements on which plant growth and development depend?
a) sulfur; nitrogen; phosphorus b) oxygen; carbon; hydrogen c) phosphorus; nitrogen; oxygen d) potassium; carbon; oxygen e) nitrogen; carbon; oxygen