Question

20.do unicellular organisms develop?

Explanation:

Unicellular organisms do develop. Development in unicellular organisms involves processes like cell growth (increase in cell size, e.g., in bacteria as they synthesize new components before division), cell division (reproduction, like binary fission in prokaryotes or mitosis in unicellular eukaryotes like yeast, which also allows for population growth and can involve changes in cell structure/function during the cell cycle), and sometimes differentiation in response to the environment (e.g., some unicellular algae form spores or cysts with altered structures for survival in harsh conditions, or bacteria forming endospores). These changes over time (growth, division, adaptive structural/functional changes) constitute development, though simpler than in multicellular organisms with complex tissue/organ development.

Answer:

Yes, unicellular organisms do develop. Their development includes cell growth, cell division (reproduction and cell - cycle - related changes), and sometimes environmental - response - based differentiation (e.g., spore/cyst formation, endospore formation) that involves changes in structure/function over time.