Silent mutations are mutations in DNA that do not have an observable effect on the organism's phenotype. They are a specific type of neutral mutation.
Mutations that cause the altered codon to produce an amino acid with similar functionality (e.g. a mutation producing leucine instead of isoleucine) are often classified as silent; if the properties of the amino acid are conserved, this mutation does not usually significantly affect protein function.
Explanation: The process by which pollen is delivered to the ovule of a gymnosperm or the stigma of an angiosperm. And a pollinator is an organism or other agents such as wind or water that transfers pollen from one plant to another; most commonly applied to organisms. hope this helps!