Answer:
Human, nervous system, nerve tissue, neurons.
Explanation:
The organism is the biggest, in this case is a human, a human is composed of systems, and then organ tissue, and organ tissue is made out of cells.
The answer for this is A,
Answer:
The Lock and Key mechanism refer to the action of enzyme. According to this mechanism as a specific key open a particular lock, similarly one enzyme can perform action on one specific substrate (substance).
Answer:
B
Explanation:
The definition for 'Data' is facts and statistics collected together for reference or analysis.
So I would answer B as this seems the most appropriate