Study MaterialsNCERT SolutionsNCERT Solutions For Class 12 BiologyNCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.7 Nutrient Cycling

NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.7 Nutrient Cycling

NCERT Solutions for Class 12 Biology Chapter 14 Topic- Nutrient Cycling

NCERT Solutions for Class 12 Biology Chapter 14 Topic- Nutrient Cycling and all chapter Topics produced by qualified teachers according to NCERT (CBSE) book rules are available as a free PDF download. Class 12 Biology Chapter 14 Topic- Nutrient Cycling Questions with Solutions to assist you in revising the entire syllabus and achieving higher grades. Register to receive all exercise solutions through email.

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    Overview of Topics

    A nutrient cycle is like a repeating journey that nutrients take to be reused. It involves cells, living things, groups of living things, and the environment.

    During this process, nutrients are taken in, moved around, released, and taken in again. It’s like nature’s way of recycling mineral nutrients. When plants and animals die and break down, the nutrients they took in are given back to the environment, keeping the cycle going.

    Tiny organisms in the soil, like microbes, are key players in this recycling. They break down dead stuff to release nutrients. They also help by capturing and changing nutrients into forms that plants can use. The speed at which nutrients move through this cycle depends on lots of things like living things, weather, and chemistry.

    Examples of this cycle include how carbon, nitrogen, water, and oxygen move around in nature.

    Nutrient Cycles Examples

    Nutrient recycling relies on both living and non-living parts of the environment. Non-living parts include air, water, and soil. Carbon, hydrogen, nitrogen, and oxygen are recycled in air, water, and soil, while calcium, phosphorus, potassium, and others are mainly recycled in soil and are found nearby.

    The four primary nutrient cycles are:

    Carbon Cycle

    • Carbon is found in every living cell. It’s in organic matter and biomolecules too. In the air, carbon mostly exists as carbon dioxide and methane.
    • Carbon moves back and forth between living things and the environment through photosynthesis and respiration. Plants use photosynthesis to take in carbon dioxide from the air. When living things breathe, they release carbon dioxide.
    • Burning fossil fuels and car exhaust also release carbon into the air. When things die and break down, organic carbon gets released into the air too.

    Nitrogen Cycle

    • Nitrogen is crucial for life, but living things can’t use it directly. Instead, it needs to be changed into different forms.
    • Nitrogen-fixing bacteria change atmospheric nitrogen into ammonia, and then nitrifying bacteria change it into nitrate, which plants can use. Lightning also helps turn atmospheric nitrogen into nitrates for plants to use.
    • Decomposers break down dead organic matter, releasing nitrogen back into the soil.
    • Denitrifying bacteria convert ammonia and nitrates back into nitrogen gas, which returns to the atmosphere.

    Oxygen Cycle

    • Oxygen is necessary for living things. Water creatures rely on oxygen dissolved in water. Oxygen helps break down natural waste.
    • Plants mainly make the oxygen we breathe. Animals breathe in oxygen and release carbon dioxide, which plants use for making oxygen.

    Water cycle

    • Water is crucial for life to thrive on our planet.
    • When the sun heats up water from oceans, lakes, rivers, and other sources, it turns into vapor through evaporation and transpiration from plants. This vapor then cools down and forms droplets, falling back to earth as precipitation. The water that lands on the ground seeps into the soil, becoming groundwater. This process repeats continuously.

    FAQs on NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.7 Nutrient Cycling

    What are the 4 main nutrient cycles?

    The 4 Main Nutrient Cycles are Carbon Cycle, Nitrogen Cycle, Oxygen Cycle & Hydrologic Cycle

    What is cycle nutrition?

    Create a plan for what you eat when cycling. Before you start, have something with protein and drink enough water. While cycling, eat foods with carbohydrates like energy bars. After you finish cycling, eat foods with both protein and carbohydrates to help your body recover, such as recovery bars, nuts, or dried f

    What is nutrient cycle 12th biology?

    Nutrient cycling refers to the transfer of inorganic nutrients between living and non-living parts of the environment. When plants and animals die, decomposers break down their remains into basic nutrients.

    What is the role of nutrient cycling?

    Nutrient cycling is how nutrients move around in nature. It helps soil and the things living in it get the nutrients they need every day. There are different kinds of nutrient cycles that are important for keeping ecosystems healthy.

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