Question

Plants need certain bacteria to produce usable nitrogen compounds because:

Plants need bacteria to produce plant protein

There is no nitrogen in the soil

the bacteria produce the basic sugars needed as plant food

Plants cannot separate the nitrogen gas molecule into a usable element

Answer 1

Plants cannot separate the nitrogen gas molecule into a usable element

Step-by-step explanation:

Nitrogen is an essential element for plant growth and development, but it is present in the air as a gas (N2) that is not readily usable by plants. Nitrogen-fixing bacteria, such as rhizobia and cyanobacteria, can convert nitrogen gas into usable forms of nitrogen, such as ammonia and nitrates, through the process of nitrogen fixation. These nitrogen compounds can then be taken up by plants and used to synthesize amino acids, which are the building blocks of proteins, and other essential molecules.