Fill in the blanks:
$(1)$ ........ initiate rooting.
$(2)$ The pigment involved in photo-perception in flowering plants is ........
$(1)$ ........ initiate rooting.
$(2)$ The pigment involved in photo-perception in flowering plants is ........
(A) $(1)$ Auxins are the plant hormones that initiate rooting in stem cuttings.
$(2)$ Phytochrome is the pigment involved in photo-perception (photoperiodism) in flowering plants.
$(2)$ Phytochrome is the pigment involved in photo-perception (photoperiodism) in flowering plants.
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$(1)$ Photoperiodism is essential for flowering in plants.
$(2)$ Abscission (leaf fall,flower fall,fruit fall) increases the vitality of plants.
$(1)$ Photoperiodism is essential for flowering in plants.
$(2)$ Abscission (leaf fall,flower fall,fruit fall) increases the vitality of plants.
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