<P> In gymnosperms and flowering plants , the megaspore is produced inside the nucleus of the ovule . During megasporogenesis , a diploid precursor cell , the megasporocyte or megaspore mother cell , undergoes meiosis to produce initially four haploid cells ( the megaspores ) . Angiosperms exhibit three patterns of megasporogenesis : monosporic , bisporic , and tetrasporic , also known as the Polygonum type , the Alisma type , and the Drusa type , respectively . The monosporic pattern occurs most frequently ( > 70 % of angiosperms ) and is found in many economically and biologically important groups such as Brassicaceae ( e.g. , Arabidopsis , Capsella , Brassica ) , Gramineae ( e.g. , maize , rice , wheat ) , Malvaceae ( e.g. , cotton ) , Leguminoseae ( e.g. , beans , soybean ) , and Solanaceae ( e.g. , pepper , tobacco , tomato , potato , petunia ) . </P>
<P> In gymnosperms and flowering plants , the megaspore is produced inside the nucleus of the ovule . During megasporogenesis , a diploid precursor cell , the megasporocyte or megaspore mother cell , undergoes meiosis to produce initially four haploid cells ( the megaspores ) . Angiosperms exhibit three patterns of megasporogenesis : monosporic , bisporic , and tetrasporic , also known as the Polygonum type , the Alisma type , and the Drusa type , respectively . The monosporic pattern occurs most frequently ( > 70 % of angiosperms ) and is found in many economically and biologically important groups such as Brassicaceae ( e.g. , Arabidopsis , Capsella , Brassica ) , Gramineae ( e.g. , maize , rice , wheat ) , Malvaceae ( e.g. , cotton ) , Leguminoseae ( e.g. , beans , soybean ) , and Solanaceae ( e.g. , pepper , tobacco , tomato , potato , petunia ) . </P>
where is the megaspore found in the pine
where is the megaspore found in the pine
inside the nucleus of the ovule
inside the nucleus of the ovule