The nitrifying bacteria are

What are bacteria that absorb the Gram stain called?

Read the following statements:
$A.$ Mango is included under order 'Poales'.
$B.$ Chemosynthetic autotrophic bacteria oxidize various inorganic substances such as nitrite and ammonia and use the released energy for their $ATP$ production.
$C.$ Members of Ascomycetes are parasitic only.
$D.$ In one citric acid cycle,$2 NADH_2$ and $1 FADH_2$ are formed.
$E.$ Pyruvic acid $+ CoA + NAD^+ \xrightarrow{\text{Pyruvate dehydrogenase}} \text{Acetyl } CoA + CO_2 + NADH + H^+$.
Choose the correct option:

Which type of bacteria show adaptation at $100^{\circ}C$ temperature?

The organisms which completely lack a cell wall and can live without oxygen are

$A$ few organisms are known to grow and multiply at temperatures of $100-105^{\circ}C$. They belong to: