Examlex
According to Perry, the individual views the world in terms of polarities, such as good and evil, during the __________ stage of development.
Growth Factors
A group of more than 50 extracellular peptides that signal certain cells to grow and divide.
Choanoflagellates
Collared flagellate protists; opisthokonts closely related to animals.
Signal Transduction Pathways
Systems of molecules in a cell that work together to transmit signals from the cell's surface to its interior, triggering a response.
Polar Signaling Molecules
Molecules that are involved in the transmission of signals across cell membranes and can interact with polar environments due to their electrical charge.
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