7. Phytochrome prevents seeds of some plants from germinating when they are in deep shade by the: absorption of far-red wavelengths by chlorophyll. slow conversion of Pfr to Pr in the dark. absorption of red wavelengths by Pr. absorption of far-red wavelengths by Pfr. slow conversion of Pr to Pfr in the dark.

Function of Phytochrome

Explanation:

The color of light that they absorb maximally by the two types such as   Pfr is a blue-green structure that ingests far-red light (730 nm) and Pr is a blue structure that retains red light (660 nm)Pfr assimilates far-red light, it is changed over to the Pr structurePfr can spontaneously revert to the Pr form  structure in obscurity dark over time = dark reversion Pfr is additionally helpless to proteinases Pfr contains  some red light, so in red light 15% Pr and   there is a parity of 85% Pfr.The  phytochrome (Pr) is changed over to the organically dynamic structure red light with the Pfr under illuminationDarkness and Far -red light convert the particle back to the inactive form.

The answer is observations and interpreting.