Question

Complete the following sentences to describe how seed germination can be adapted to environmental conditions. rainfall For a seed to germinate, the embryo will need eaten water and soil However, some seeds also require specific to germinate water and oxygen to open and For example, some pines require release seeds promote Other plants require embryo growth to remove chemicals that cones inhibit or regurgitated to stimulate Some seeds even require being germination stimuli fire dormancy water stimulate Reset

Answer 1

Page 1 & Forr a seed to germinate , the embryo will need Water. Water is required for germination Mature Seeds are often extreamely to take significant amount of water for cellular metabolism ang growth. With out water seeds con't use their stored energy. day and need How ener, some seeds also ure quer specifie stimuli to germinate, are resume Dormant seeds viable seeds that do not germinate because they requir specific internal environmental stimeli 'to growth. Light an environmental foretor that stimulates the germination process. Phyto- chrome B the photo repep for that is is responsible for the beginning stages of germination. can be

Four example, some ipines require Page 2 fiore to open Cones .and vrelease seed. Certain pine cones called serotinous cones are covered in a resin that must be melted for the cone to open and release its seeds. The high temperatures of a forest fire serves to melt the cone. requer doumaney to remove Other plant Chemicals that inhibit embryo growth. etc Some cereal seeds such as barley, cats, wheat au need sto kept under dry storage condition at normal temperature for about few weeks to several moriths. During this period probably Que to certain physiological changes in the embryo, removal of inhibitory enzyme , hormons the seed develop the capacity to germinate This method called as after - ripening. even require being laten or uregurgitated to stimulate germination Some seeds have tough seed ea coats. Some Seed coats are weakened in the stomach of animadas the fruit and the seeds Animals and birds help in dispersal of seed Some seeds that eat pass
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