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(D) Let us analyze each statement:$(A)$ $Nostoc$ is a cyanobacterium that contains specialized cells called heterocysts for nitrogen fixation. This st

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(D) Let us analyze each statement:$(A)$ $Nostoc$ is a cyanobacterium that contains specialized cells called heterocysts for nitrogen fixation. This statement is correct.$(B)$ Bacteria exhibit diverse modes of nutrition; while many are heterotrophs,many are also autotrophs (photosynthetic or chemosynthetic). This statement is incorrect.$(C)$ $Funaria$ is monoecious (bisexual),but $Marchantia$ is dioecious (unisexual). This statement is incorrect.$(D)$ Diatom cell walls are embedded with silica,making them indestructible and forming 'diatomaceous earth'. This statement is incorrect.Therefore,only statement $(A)$ is correct. The total number of correct statements is $1$.

Read the following four statements $(A-D)$ carefully :
$(A)$ Heterocyst is found in $Nostoc$
$(B)$ All bacteria are heterotrophs
$(C)$ Both $Funaria$ and $Marchantia$ are monoecious.
$(D)$ The walls of diatoms are easily destructible.
How many of the above statements are correct?

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Read the following four statements $(A-D)$ carefully :$(A)$ Heterocyst is found in $Nostoc$$(B)$ All bacteria are heterotrophs$(C)$ Both $Funaria$ and $Marchantia$ are monoecious.$(D)$ The walls of diatoms are easily destructible.How many of the above statements are correct?