Auxospores and hormocysts are formed by $.....$ respectively.

Consider the following statements $(A-D)$:
$(A)$ Heterocysts are important sites for nitrogen fixation in $\text{BGA}$.
$(B)$ Cell wall of diatoms is indestructible due to presence of calcium carbonate.
$(C)$ In fungi,the cell wall is made up of chitin.
$(D)$ Algae show isogamous,anisogamous,and oogamous types of sexual reproduction.
How many of the above statement$(s)$ is/are not correct?

Select the correct option based on the evolutionary relationships between the kingdoms.

The three-domain system of classification is based on:

What is the nature of the offspring produced by organisms included in Protista and Monera?

In which of the following organisms is the presence of a rigid cell wall observed?