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Question
Neck canal cells in Dryopteris are
Neck canal cells in Dryopteris are
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Solution
The correct option is A One with two nuclei
The archegonium in Dryopteris is flask shaped and consists of a swollen venter and a slender neck. It lacks venter wall but contains the naked egg with a small venter canal above it. The neck possess wall of 4 vertical rows of sterile neck cells which enclose a central neck canal. The latter normally contains a single, long neck canal cells with two nuclei, as there is no wall formation between the neck canal cells both nuclei are seen in the cell. Thus, the correct answer is option A.
The archegonium in Dryopteris is flask shaped and consists of a swollen venter and a slender neck. It lacks venter wall but contains the naked egg with a small venter canal above it. The neck possess wall of 4 vertical rows of sterile neck cells which enclose a central neck canal. The latter normally contains a single, long neck canal cells with two nuclei, as there is no wall formation between the neck canal cells both nuclei are seen in the cell. Thus, the correct answer is option A.
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