A feature of reproduction that is common to Amoeba, Spirogyra and Yeast are that
(a) they reproduce asexually.
(b) they are all unicellular.
(c) they reproduce only sexually.
(d) they are all multicellular.
- Amoeba reproduces by Binary fission.
- Spirogyra reproduces by Fragmentation.
- Yeast reproduces by Budding.
Binary Fission, Fragmentation and Budding are all means of asexual reproduction.
So, the correct answer is (a) - they produce asexually.