The sexual reproduction is absent in (1)Spirogyra (2)Nostoc (3)Ulothrix (4)Vowox
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0
Answer:
1. spirogyra which reproduces by asexual mode of reproduction
Answered by
1
Answer:
Answer is b.
Explanation:
Ulothrix species are unbranched filamentous green algae. Reproduction in Ulothrix takes place by means of vegetative, asexual and sexual methods. Nostoc is free-living nitrogen-fixing cyanobacteria having cells arranged in beadlike chains (trichomes) that are grouped together in a gelatinous mass (Nostoc balls). Reproduction is only by vegetative and asexual methods. Aspergillus is a genus of fungi in which reproduction occurs by asexual and sexual methods. Volvox is a genus of freshwater green algae. Most species of Volvox reproduce both asexually and sexually.
Thus, the correct answer is option B.
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