Which of the following best describes a way in which a normal growth factor can stimulate cell division? A A growth factor can bind to membrane receptors and initiate a signal transduction path- way that causes the synthesis of division-facilitating enzymes. B A growth factor can supply necessary biomolecular building blocks for cell division by diffusing through the cell membane. с A growth factor can facilitate the transport of glucose into the cell, thereby providing it with nutrients to support cell division. D A growth factor can inhibit specific checkpoints in the cell cycle and allow the cell to skip or bypass certain cell cycle phases.

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Learning and memory

Learning is defined as a relatively permanent and irreversible adaptive change in behavior. It always results from experience. The ability of an organism to store and recall the effects, sensations, and knowledge gained through learning and experience is called memory.