A) bryophytes
B) pteridophytes
C) angiosperms
D) all of these
Correct Answer: D
Solution :
Butler et. ai, (1959) isolated a glyco protein pigment complex having molecular weight of around 1,25,000 and named it phytochrome. It is found in all green plants except algae. It is found two forms PR and Pfr which are inter conver table.
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