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Question
Most common type of embryo sac reported in angiosperm is of
Most common type of embryo sac reported in angiosperm is of
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Solution
The correct option is A Polygonum
The following three types of embryo sacs have been recognized on the basis of: (1) the number of megaspores taking part in the development of embryo sac. (2) the number of divisions occurring in the nucleus of the functional megaspore and (3) organization of nuclei in the mature embryo sac: monosporic, bisporic and tetrasporic.
Monosporic is further classified into several types.
Monosporic 8-nucleate or Polygonum type - This type of embryo sac develops from the chalazal megaspore. Its nucleus divides thrice to form 8 nuclei. This type is generally referred to as normal type of embryo sac. It is also called Polygonum type. It was first time described in Polygonum divaricatum by Strasburger
So, the correct answer is 'Polygonum'
The following three types of embryo sacs have been recognized on the basis of: (1) the number of megaspores taking part in the development of embryo sac. (2) the number of divisions occurring in the nucleus of the functional megaspore and (3) organization of nuclei in the mature embryo sac: monosporic, bisporic and tetrasporic.
Monosporic is further classified into several types.
Monosporic 8-nucleate or Polygonum type - This type of embryo sac develops from the chalazal megaspore. Its nucleus divides thrice to form 8 nuclei. This type is generally referred to as normal type of embryo sac. It is also called Polygonum type. It was first time described in Polygonum divaricatum by Strasburger
So, the correct answer is 'Polygonum'
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