Question

A feature of reproduction that is common to the amoeba, Spirogyra, and Yeast is that
A.They reproduce asexually
B.They are all unicellular
C.They reproduce only sexually
D.They are all multicellular

Answer 1

Hint:Reproduction is a process of reproducing young ones. It can be asexual or sexual. Different organisms reproduce by different means. Some organisms do not reproduce, such as mules, sterile worker bees, etc.

Complete answer:Mainly all living organisms reproduce by different means. Non-living organisms cannot reproduce or replicate themselves. Reproduction refers to the production of young ones possessing features more or less similar to those of parents. Many living organisms like mules, sterile worker bees, infertile humans do not reproduce, still are living organisms.

Organisms reproduce by sexual as well as asexual means. Fungi multiply and spread easily due to millions of asexual spores. Yeast and Hydra reproduce by budding (asexual reproduction). Planaria (flatworms) show true regeneration, that is, a fragmented organism regenerates the lost part of the body and becomes a new organism. Fungi reproduce by fragmentation. In unicellular organisms like bacteria, unicellular algae, or Amoeba, reproduction is similar to growth, i.e., an increase in the number of cells.
As Amoeba, Spirogyra, and Yeast all reproduce by asexual means, thus correct option is A. They reproduce asexually.

Note:Few differences between unicellular and multicellular organisms are-

Unicellular organisms	Multicellular organisms
They contain a single cell in their body.	They contain many cells in their body.
Membrane-bound organelles are absent.	They contain membrane-bound organelles.
All processes are carried out by a single cell.	Cells are differentiated according to their function.
Asexually reproduce by binary fission.	Asexually reproduce by mitosis.
Sexually reproduce by conjugation.	Sexually reproduce by gamete production.