Conduction and refractory periods (states) are typical of ________.

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#Question id: 6967

#Unit 5. Developmental Biology

Gastrulation in sea urchins, Drosophila, and Xenopus all begin with a change in cell shape, in which the apical surface of an epithelial sheet contracts. This process is called:

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#Question id: 353

#Unit 1. Molecules and their Interaction Relevant to Biology

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

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#Question id: 19220

#Unit 12. Applied Biology

Opines are unique and unusual condensation products of either an amino acid and a keto acid or sugar. The condensation product of arginine and pyruvic acid is called 

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#Question id: 9265

#Unit 9. Diversity of Life Forms

To apply parsimony to constructing a phylogenetic tree,

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#Question id: 11958

#Unit 7. System Physiology – Animal

Fat digestion yields fatty acids and glycerol, whereas protein digestion yields amino acids; both digestive processes ________.