On germination,a seed first produces shoots with leaves,and flowers appear later.
$(A)$ Why do you think this happens?
$(B)$ How is this advantageous to the plant?

(N/A) As soon as a seed germinates,the plant enters a vegetative growth phase. During this phase,the plant perceives light stimuli (photoperiodism) and synthesizes florigen,a hypothetical flowering hormone,which eventually induces the transition to the reproductive phase.
$(B)$ This vegetative growth period is advantageous because it allows the plant to accumulate sufficient biomass,develop a robust root and shoot system,and reach physiological maturity. This ensures the plant has enough energy and structural integrity to support the development of reproductive structures like flowers,fruits,and seeds,thereby increasing the chances of successful reproduction.