AP BIOLOGY

Detailed explanation-1: -Plant cells communicate to coordinate their activities in response to the changing conditions of light, dark, and temperature that guide the plant’s cycle of growth, flowering, and fruiting. Plant cells also communicate to coordinate what goes on in their roots, stems, and leaves.

Detailed explanation-2: -In animals, cell-to-cell communication is facilitated by both hormones and the neuronal systems. Plants lack neuronal systems and rely largely on hormones and secreted small peptides for communication.

Detailed explanation-3: -Hormones mediate changes in target cells by binding to specific hormone receptors. In this way, even though hormones circulate throughout the body and come into contact with many different cell types, they only affect cells that possess the necessary receptors.

Detailed explanation-4: -Plasmodesmata are channels that span cell walls, helping plant cells communicate.