Answer:
The answer is natural selection.
Explanation:
Natural selection will make an organism to survive and reproduce because, it will be better suited to the environment.
This is the reason why natural selection is considered as a key mechanism of the evolution.
Answer:
Post-synaptic neurons after receiving correct ligands called as neurotransmitter in correct amount generates action potential. This action potential may be inhibitory or accelatory.
Explanation:
Postsynaptic neuron
:
These are the neurons that is present after the gap called synapse. These neurons after receiving correct ligands called as neurotransmitter in correct amount generates action potential. This action potential may be inhibitory or accelatory.
There are number of neurotransmitter. These includes
GABA ergic: This neurotransmitter is often inhibitory.
glutamatergic: This neurotransmitter is often excitatory.
Adrenergic: This neurotransmitter releases norepinephrine.
Cholinergic: This neurotransmitter activates vertebrate neuromuscular junction.
The iris focuses light rays before they enter the posterior portion of the eye
