Intact sensory nerve pathways - all the way to the relevant area of the sensory cortex of the cerebrum - are needed.
stimulus present, receptor activated, nerve impulse conduction
Oxygen
RNA polymerase is the enzyme needed for transcription to take place. It catalyzes the synthesis of an RNA molecule from a DNA template.
The army was needed for the battle that was going to take place.
Co2
Water and oxygen are needed.
Oxygen and mitochondria.
they didn't they walked to place to place because they couldn't take the bus
glucose and oxygen
Water and sun
Oxygen is the chemical needed for respiration to take place. It is required for the process of cellular respiration, where glucose is broken down to produce energy in the form of ATP.
Oxygen is a very important agent needed for rusting and decaying to take place. Oxygen binds with the surface and creates water while breaking down the substance.