Which of the following is a characteristic of | vedclass

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(D) Blue-green algae (Cyanobacteria) are prokaryotic organisms.Prokaryotic cells are characterized by the following features:$1$. They lack a well-def

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All of the above

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(D) Blue-green algae (Cyanobacteria) are prokaryotic organisms.Prokaryotic cells are characterized by the following features:$1$. They lack a well-defined nucleus (nucleoid is present).$2$. They lack a nuclear membrane surrounding the genetic material.$3$. Their $DNA$ is circular and lacks histone proteins,which are typically found in eukaryotic $DNA$.Since all the given options are characteristic features of prokaryotes,the correct answer is $D$.

Column-$I$ (Group of bacteria)	Column-$II$ (Their shape)
$a.$ Coccus	$(i)$ Rod-shaped
$b.$ Bacillus	$(ii)$ Spherical
$c.$ Spirillum	$(iii)$ Spiral
$d.$ Vibrio	$(iv)$ Comma-shaped

Which of the following is a characteristic of blue-green algae?

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Match the following:
Column-$I$ (Group of bacteria) Column-$II$ (Their shape)
$a.$ Coccus $(i)$ Rod-shaped
$b.$ Bacillus $(ii)$ Spherical
$c.$ Spirillum $(iii)$ Spiral
$d.$ Vibrio $(iv)$ Comma-shaped

What is the primary function of a heterocyst in cyanobacteria?

Endospores formed by certain bacteria are actually the means for

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