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(C) The correct statement is that there are many embryos of different sizes and shapes in the seeds of orange. This phenomenon is known as polyembryon

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There are many embryos of different sizes and shapes in the seeds of orange.

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(C) The correct statement is that there are many embryos of different sizes and shapes in the seeds of orange. This phenomenon is known as polyembryony. $A$. The hanging drop method is used for in-vitro (not in-vivo) germination of pollen grains to study pollen tube growth. $B$. The obturator is a structure that guides the pollen tube,but it is not a universal feature for all seeds. $C$. Polyembryony is common in citrus fruits like orange,where multiple embryos develop within a single seed. $D$. In adventive embryony,embryos arise from diploid sporophytic cells (like nucellus or integuments),not from the egg cell.

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