By looking for the presence of the germ layers and the primitive gut in the embryo
The Gallbladder stores bile that is produced in the liver
They say how an enzyme perfectly fits into its substrate is alike a "lock and key".
Only one specific enzyme can fit a specific substrate.
What are you asking for here? we need a solid question not a statement.
i'd say that the statement is true. we cant define life because we do not know what life, in essence, is. we can define, however, the characteristice of all living things:
Movement
Respiration
Sensitivity
Nutrition
Excretion
Reproduction
Growth
MRS NERG
