Some bacteria are facultative anaerobes, which usually produce atp by aerobic respiration but are also capable of switching to fermentation when there is a lack of in their environment. a) water b) oxygen c) glucose d) carbon dioxide

Ans.

Facultative anaerobes are those organisms that can survive in both the absence or presence of oxygen in their surrounding. Bacteria that belong to this group show aerobic respiration to make ATP molecues, when oxygen is present in their environment. When oxygen is absent, they switch to anaerobic respiration, which involves ATP formation by the process of fermentation.

Thus, the correct answer is 'option B). oxygen.'

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a