Question

how do autotrophs obtain CO2 AND N2 TO MAKE THEIR FOOD

Answer 1

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For the prepration of food,

Autotrophs obtain CO₂ directly

directly from the atmosphere from the stomata by the process of diffusion

But, they cannot obtain N₂ directly from the atmosphere, or rather they cannot synthesis the N₂ in the air , as they are bonded by triple bonds and hard to break. They obtain N₂ from the soil, where it has already been broken down by the nitrogen-fixing bacteria.