NEET Biology Natural Resources Revision Notes

Download the latest NEET Biology Natural Resources Revision Notes in PDF format. These Full Course Biology revision notes are carefully designed by expert teachers to align with the 2026-27 syllabus. These notes are great daily learning and last minute exam preparation and they simplify complex topics and highlight important definitions for Full Course students.

Key Concepts & Revision: Full Course Biology Natural Resources

Every Full Course Biology student can review these Natural Resources notes to grasp main concepts quickly. The exam-friendly summaries highlight hard sections and high-scoring areas to make school assessments and final tests much easier.

Full Course Biology Natural Resources Concept Notes

In the universe only in our planet earth life exists. Earth has three components:

NEET Biology Natural Resources Revision Notes

 

The life supporting zone of earth where atmosphere, hydrosphere and lithosphere meet, interact and make life possible is called biosphere. A constant interaction between non-living (abiotic) and living (biotic) components of the biosphere results in teh transer of food and energy, which makes the biosphere a dynamic but stable system.
 
Biosphere includes all of the earth’s living organism interacting with the physical environment in a manner that helps to maintain a steady state of equilibrium of energy flow. However, each organism has its own dwelling place, called habitat. Thus, for a fish living in fresh water pond, the pond it its habitat.
NEET Biology Natural Resources Revision Notes1
 
 
Abiotic components : The different mineral salts such as calcium, potassium, magnesium, gases such as oxygen, nitrogen, carbon dioxide, water and soil form the obiotic factors of ecosystem. Besides these organic compounds such as protein, carbohydrates lipid, humic subtances etc. also form the aboitic components. The producers (green plants) utilize these substances from soil and air in order to prepare the food which is ultimately transferred to different consumers.
 
The two processes such as energy movement (Energy flow) and nutrient movement (Biogeochemical cycle), are the important functions of an ecosystem.
 
Energy flow : The movement of energy in the ecosystem is in a single direction and non-cyclic. There is a continuous transfer of energy from one trophic level to the next trophic level in the food chain. At each leve, energy is used by the organism for metabolic activities and for growth and some amount is released (utilized energy) as heat to the environmnt which cannot be reused by plants. Therefore the amount of energy available at each successive trophic level is less than the energy at the previous level. As per Ten percent law, only ten percent of the energy entering a particular trophic level is stored and the remaining is lost during transfer.

NEET Biology Natural Resources Revision Notes2

 

Biogeochemial cycles : In a food chain it is noticed that some energy is lost at every trophic level but there is no loss in the nutrient component. Only when th eorganisms die and decay, teh nutrients are released to the environment due to the action of decomposers, thus the nutrients are available for reuse and for recycling. The cyclic flow of nutrients between non-living environment (soil, air, water) and living organisms is called biogeochemical cycles. The circulation of essential chemical nutrients like Carbon, Oxygen, Nitrogen, Sulphur, Water etc., in a biosphere is called biogeochemical cycles. Carbon cycle : All organic compounds that enter into the composition of living matter contain carbon. The three
main sources of carbon are (a) CO2 of the air and CO2 dissolved in oceans. (b) Carbonate rock in teh earths’ crust and (c) Fossil fuels like coal and petroleum. Being a major elements involved in the fixation of energy by photosynthesis, it is closely tied to energy flow and the two are inseparable.
 
The basic movement of carbon is from atmosphere reservoir (0.032% concentratoin) to producer, through photosynthesis. Inside the biosphere, the movement of carbon is through the food chains from teh producers to the consumers and from these groups to decomposers. Carbon is returned to the surroundign medium as carbon dioxide. cycling of CO2 occur in the following ways (a) by respiration in plants and animals and (b) by decay and decomposition by decomposers and also by (c) the burning of wood and fossil fuels.
NEET-Biology-Natural-Resources-Revision-Notes_0 1
 
4.2 Nitrogen Cycle : Nitrogen is an essential component of all protein and nucleic acides which form the structural framework of the living organisms. Though atmosphere contains aobut 78% of nitrogen, if cannot be utilized by living organisms unless it is converted to ammonia, amino acids or nitrates. These compounds which are available in teh soil is cycle and recycled through the ecosystem.
Nitrogen cycle involves, nitrogen fixatin, nitrogen assimilation, ammonification, nitrification and denitrification.
 
During nitrogen fixation, nitrogen is oxidized to oxides by lightening and thse oxides get dissolved in rain water and get precipitated. During biological nitrogen fixation, the nitrogen fixing bacteria and blue green algae convert gaseous nitrogen to ammonia and nitrates.
Nitrogen assimilatin : Nitrates are reduced to form amino acids within the plants and are ultimately converted to proteints. Animals get their supply of nitrogen in teh form of plant or animal protein thrugh food chain.
 
Ammonification : Proteins of animals are exerted out in the form of urea, uric acid of ammonia and als when the plants and animals die, their proteins are broken to release ammonia by the action of bacteria and certain fungi.
Nitrification : During this process, the ammonia is convered to nitrites and nitrates by soil bacteria such as Nitrobacter and Nitrosomonas which are then absorbed by plants though their roots.
Denitrification : Free living soil bacteria such as Pseudomonas reduce nitrate ions of soil into gaseous nitrogen which returns to the atmosphere.
NEET-Biology-Natural-Resources-Revision-Notes_0 2
 
Micro-organisms involved in N cycle are
NEET-Biology-Natural-Resources-Revision-Notes_0 3
 
Oxygen cycle : The atmosphere contains about 21% of oxygen. It is found dissolved in water. It is also found as a constituent of water (H2O) carbon dioxide (CO2) and other organic and inorganic compounds.Oxygen is very essential for all living beings for their respiration. It is also used for burning o fuels suchas coal, wood etc.
NEET-Biology-Natural-Resources-Revision-Notes_0 4
 

Free study material for Biology

Study Material & Revision Notes for Full Course Biology Natural Resources

NEET Full Course Biology Natural Resources Notes

Review these Revision Notes for Natural Resources to grasp essential chapter ideas efficiently. Aligned with current NEET standards for Full Course, this material helps clarify difficult themes. Consistent reading of these targeted notes ensures solid preparation for upcoming school assessments.

Core Chapter Summary & Practice Sets for Natural Resources

Compiled directly from the official NCERT book for Full Course Biology, these notes offer reliable academic support. Following your chapter summary review, our educators recommend checking our detailed NCERT solutions for Full Course to compare your understanding, helping build a strong foundation in Biology.

Enhance Retention with Free Study Materials

Enhance your academic standing by completing the MCQ questions and practice worksheets offered alongside. These solved checks confirm your command of Natural Resources ideas. All website learning assets are free of charge, structured around latest Biology patterns. Reading these revision notes daily cultivates deep test assurance.

FAQs

Where can I download the latest PDF for NEET Biology Natural Resources Revision Notes?

You can download the teacher prepared revision notes for NEET Biology Natural Resources Revision Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Full Course students get the best study material for Biology.

Are these Biology notes for Full Course based on the 2026 board exam pattern?

Yes, our NEET Biology Natural Resources Revision Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Biology principles which is important for getting more marks in 2026 NEET exams.

Do these Full Course notes cover all topic-wise concepts for Biology?

Yes, our NEET Biology Natural Resources Revision Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of NEET syllabus in Full Course is covered.

How can I use NEET Biology Natural Resources Revision Notes for quick last-minute revision?

These notes for Biology are organized into bullet points and easy-to-read charts. By using NEET Biology Natural Resources Revision Notes, Full Course students fast revise formulas, key definitions before the exams.

Is there any registration required to download Full Course Biology notes?

No, all study resources on StudiesToday, including NEET Biology Natural Resources Revision Notes, are available for immediate free download. Full Course Biology study material is available in PDF and can be downloaded on mobile.