Select the correct pair.

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(A) Option $A$ is correct. $Nostoc$ is a cyanobacterium (blue-green alga) that possesses specialized cells called heterocysts,which are responsible fo

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Nitrogen fixation - Nostoc

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(A) Option $A$ is correct. $Nostoc$ is a cyanobacterium (blue-green alga) that possesses specialized cells called heterocysts,which are responsible for nitrogen fixation.Option $B$ is incorrect because Dinoflagellates are protists,not viruses.Option $C$ is incorrect because $Paramoecium$ is a ciliated protozoan,not flagellated.Option $D$ is incorrect because $Penicillium$ is a multicellular fungus,whereas yeast is an example of a unicellular fungus.

$(1)$ Gram-positive bacteria	$(a)$ Thermoacidophiles
$(2)$ Bacteria living in acidic medium	$(b)$ Firmicutes
$(3)$ Gram-negative bacteria	$(c)$ Halophiles
$(4)$ Bacteria living in extreme salty conditions	$(d)$ Spirochetes

Similar Questions

Select the correct option for the following matches:
$(1)$ Gram-positive bacteria $(a)$ Thermoacidophiles
$(2)$ Bacteria living in acidic medium $(b)$ Firmicutes
$(3)$ Gram-negative bacteria $(c)$ Halophiles
$(4)$ Bacteria living in extreme salty conditions $(d)$ Spirochetes

Which of the following statements is correct?

Assertion: Chemosynthesis is an autotrophic nutrition.
Reason: Chemoautotrophs contain chlorophyll pigments.

Bacteria are considered primitive organisms because they

The $Archaea$ domain that lives in hot springs is .......

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