There is an activation of a specific gene by a growth factor.
Decay
As a comet approaches the Sun, the heat causes ice and other volatile substances within the comet to vaporize. This forms a glowing coma (a cloud of gas and dust) around the solid nucleus of the comet. The solar wind then pushes this gas and dust away from the Sun, forming a tail that can stretch for millions of kilometers in the opposite direction of the Sun.
Ans : unstable nucleus Anurag
The number of protons in the nucleus changes
Instability is due to a certain ratio between neutrons and protons in the atomic nucleus.
A positive response is when a response happens to a stimuli, and this response causes more of the stimuli to happen. A negative response is when a response happens because of a stimuli, and the response stops the continuation of the stimuli.
A reaction is what happens to the body when a stimulus is applied, a response is what happens next; i.e a stimulus illicits a reaction which illicits a respose. For example, glucose in the blood (a stimulus) causes the pancreas to release insulin (a reaction), which in turn causes the cells to take up glucose from the blood (a response).
A stimulus is a factor that causes a response in an organism.
stimulus
a stimulus causes a response
Decay
An action causes a reaction. This is also referred to as cause and effect in some areas.
It causes the protons in the nucleus repel each other.
A stimulus.
an antigen
It is the nucleus of the atom that undergoes change during radioactive decay.
An unstable nucleus, which can be caused by:excess of neutronsshortage of neutronsmetastable excited state of nucleus