EVERYDAY SCIENCE

Detailed explanation-1: -Conjugation tubes are formed between cells of the same filament.

Detailed explanation-2: -(1) Two filaments align and conjugation tubes are formed between cells of partner filaments. Because of similarity to a ladder, this is called scalariform conjugation. This type is generally observed in genus Spirogyra.

Detailed explanation-3: -Conjugation comprised five steps: 1) aligning with adjacent filaments, 2) formation of conjugation protrusion (papilla), 3) fusion of the protrusions, 4) formation of conjugation tube, and 5) formation of zygotes. Three lectins, ConA, RCA and UEA, showed considerable labeling during the progression of conjugation.

Detailed explanation-4: -The content present in the male cell passes onto the female gamete and as a result of which, a zygospore or zygote is formed. Lateral conjugation occurs in monoecious species. It is of rare occurrence that involves the fusion of gametes from two adjacent cells of the same filament in monoecious species.

Detailed explanation-5: -(b) Terminal conjugation: In this method, the so-called male gamete enters the female gamete by perforating the septum of conjugation tube. The conjugation tubes are produced on either side of the septum of the two conjugating cells.