Which of the following choices places the steps in plant cell-to-cell communication in the correct order?
a. signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor
b. cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell
c. none of the choices
d. signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression
d
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The ____ phylum has about 185 known living species of vascular, seed-bearing plants. Many of them look like palm
trees, and some produce massive strobili, with male and female strobili found on separate plants.
a. Cycadophyta b. Anthophyta c. Gnetophyta d. Coniferophyta e. Ginkgophyta
"H zones" in skeletal muscle are composed of
a. discs to which thin filaments are anchored. b. stacked thick filaments along with parts of thin filaments that overlap both ends. c. thin filaments but no thick filaments. d. thick filaments but no thin filaments. e. discs to which thick filaments are anchored.
Which of the following does NOT have an exoskeleton?
a. lobsters b. spiders c. insects d. earthworms e. centipedes
The animals used in the text to show variation in
domesticated forms are a. pigeons. b. chickens. c. pigs. d. dogs. e. cats.