Sexual reproduction in which cells of two different Spirogyra filaments conjugate is known as

Lateral conjugation

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Scalariform conjugation

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Parthenocarpy

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Azygospory

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Solution

The correct option is B Scalariform conjugation
Scalariform conjugation requires association of two different filaments lined side by side either partially or throughout their length. One cell each from opposite lined filaments emits tubular protuberances, known as conjugation tubes, which elongate and fuse, to make a passage called as the conjugation canal. The cytoplasm of the cell acting as the male travels through this tube and fuses with the female cytoplasm, and the gametes fuse to form a zygospore.

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Similar questions

Q. Cells of two different filaments are involved in conjugation of Spirogyra. The type of sexual reproduction is ___________.

Q. The filaments of spirogyra aplanospora are observed. One of the filaments has 150 cells another contains 225 cells. If all the cells in both the filaments are involved in asexual reproduction, what is the ratio of new filaments developed from them?

In Spirogyra, asexual reproduction takes place by :
(a) division of a cell into two cells.
(b) breaking up of filaments into smaller bits.
(c) division of a cell into many cells.
(d) formation of a large number of buds.

Q. In which of the conjugation types, involvement of two different filaments of Spirogyra is absent?

Q. Question 8
In Spirogyra, asexual reproduction takes place by

(a) breaking up of filaments into smaller bits
(b) division of a cell into two cells
(c) division of a cell into many cells
(d) formation of young cells from older cells

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