The 'lock and key theory' states that like a key in a lock, the shape of the must fit the to affect the postsynaptic neuron.

wetland functions are defined as a process or series of processes that take place within a wetland. these include the storage of water, transformation of nutrients, growth of living matter, and diversity of wetland plants, and they have value for the wetland itself, for surrounding ecosystems, and for people.

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are there actual statements because if not my answer would be: that using the five senses the author can create a sense of worth in an object to appeal to the reader and create meaning.