I. Transfer of pollen grains from anther to the stigma of the same flower is termed as $\mathrm{ }\_\_\_\_\mathrm{P}\_\_\_\_$ .

II. Transfer of pollen grains from anther to the stigma of another flower of the same plant is termed as $\_\_\_\_\mathrm{Q}\_\_\_\_$ .

III. Transfer of pollen grains from anther to the stigma of a different plant is termed as $\_\_\_\_\mathrm{R}\_\_\_\_.$

Fill in the blanks P, Q, and R with given terms.