The Biological Process Whose Specific Outcome Is the Progression of a Multicellular Organism Over Time From an Initial Condition (e.g. a Zygote or a Young Adult) to a Later Condition (e.g. a Multicellular Animal or an Aged Adult).
The Space External to the Outermost Structure of a Cell. For Cells Without External Protective or External Encapsulating Structures This Refers to Space Outside of the Plasma Membrane. This Term Covers the Host Cell Environment Outside an Intracellular Parasite.
Interacting Selectively and Non Covalently with One or More Specific Sites On a Receptor Molecule a Macromolecule That Undergoes Combination with a Hormone Neurotransmitter Drug or Intracellular Messenger to Initiate a Change in Cell Function.