GENERAL ANATOMY
INTRODUCTION TO GENERAL ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A plant takes in nitrogen as ammonium (NH4+) after a decomposing animal has released the ammonium.
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A plant takes in nitrogen as atmospheric nitrogen (N2) captured directly from the atmosphere.
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A plant takes in nitrogen as nitrates (NO3-) after nitrogen has been transformed by bacteria.
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A plant takes in nitrogen as nitrites (NO2-) received directly from other plants.
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Detailed explanation-1: -Nitrosomonas bacteria first convert nitrogen gas to nitrite (NO2-) and subsequently nitrobacter convert nitrite to nitrate (NO3-), a plant nutrient. Plants absorb ammonium and nitrate during the assimilation process, after which they are converted into nitrogen-containing organic molecules, such as amino acids and DNA.
Detailed explanation-2: -To be used by plants, the N2 must be transformed through a process called nitrogen fixation. Fixation converts nitrogen in the atmosphere into forms that plants can absorb through their root systems.
Detailed explanation-3: -Nitrogen-fixing bacteria play a crucial role in fixing atmospheric nitrogen into nitrogen compounds that can be used by plants. The plants absorb the usable nitrogen compounds from the soil through their roots. Then, these nitrogen compounds are used for the production of proteins and other compounds in the plant cell.
Detailed explanation-4: -Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers.