The Fundamental Unit of Life — Science STD 9 — Question
Gujarat BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
MCQ
Well defined nucleus is absent in:
✓
Blue green algae
B
Diatoms
C
Algae
D
Yeast
✓
Answer
Correct option: A.
Blue green algae
Algae are a very large and diverse group of eukaryotic organisms, ranging from the microscopic unicellular Chlorella and the diatoms to giant multicellular kelps, the large brown alga.Diatoms are algae $($most commonly known as phytoplanktons$)$ with secondary chloroplasts derived from an endosymbiotic red alga.
Yeats is also a eukaryote belonging to the kingdom Fungi. However, the Blue$-$green algae or Cyanobacteria is the most primitive photosynthetic bacteria $($prokaryotic$-$ the absence of well$-$defined nucleus$)$ cell which is quite small and usually unicellular, though they often grow in colonies large enough to see.
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