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/* Analytics row (like your KPI bar style) */
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/* UNIVERSAL button styling inside tk-actions */
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NEET exam tests this topic through NOT/Except, statement based options, and “life like vs defining” confusion is tested. Use this page as a quick learning & revision hub.
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/* Subtopic rows (one per row, full width) */
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/* Traps */
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/* Practice full-width */
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/* Revision notes */
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/* Bottom actions (optional) */
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When you hear the word “living,” it feels obvious—humans, plants, animals are living. But in Biology (and in NEET), you must answer a sharper question: What features prove that something is living? NEET tests this because many features look “living” but also appear in non-living things. So, instead of remembering random points, you should understand the idea of defining properties (features that strongly indicate life) versus common-but-not-defining properties (features that can appear in non-living or may not appear in every individual).
Living organisms show a definite organization. That means they are not just a mixture of chemicals— their parts are arranged in an ordered way (cells → tissues → organs → organ systems). They also show cellular nature: every living organism is made of cells (unicellular like Amoeba or multicellular like humans). NEET frequently uses statement questions like “cell is the basic unit of life” or “all living organisms are cellular,” and expects you to identify which statements are always true and which are trap statements with extreme words.
A major life feature is metabolism he sum of all chemical reactions happening in an organism. Metabolism includes building reactions (anabolism) and breakdown reactions (catabolism). This matters because NEET sometimes frames tricky options like “metabolism always produces energy” or “metabolism occurs only in animals,” which are incorrect. Another high-value concept is homeostasisthe ability to maintain internal conditions within limits (like temperature, water balance, glucose level). Note the wording: homeostasis means controlled balance, not “no change ever.”
Now the most important NEET logic: not every “life-related” feature is defining for every individual. For example, reproduction is important for species continuity, but it is not defining for an individual because sterile organisms exist (mules) and some individuals may not reproduce. Similarly, growth alone is not a perfect defining feature because non-living things like crystals can also grow. NEET loves these traps because many students answer based on common sense instead of NCERT-like biological logic.
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background:
radial-gradient(900px 420px at 18% 20%, rgba(14,165,233,.10), transparent 60%),
radial-gradient(900px 420px at 86% 40%, rgba(99,102,241,.08), transparent 62%),
linear-gradient(135deg,#ffffff 0%, #f8fafc 55%, #ffffff 100%);
box-shadow:0 14px 30px rgba(15,23,42,.05);
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position:relative;
overflow:hidden;
min-height:150px;
}
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background:
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.tk-cta-dual h3{
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}
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font-size:13.5px;
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color:#475569;
max-width:78ch;
}
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}
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white-space:nowrap;
}
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.tk-cta-dual .tk-btn{
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padding:10px 12px;border-radius:14px;
font-size:13.5px;font-weight:550;
border:1px solid rgba(148,163,184,.55);
background:rgba(248,250,252,.95);
color:#0f172a;
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.tk-cta-dual .tk-btn.primary{
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/* Optional: subtle emphasis styles per side */
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A practical guide covering NRI Quota admission process, fee, colleges, counseling, sponsor rules, document checklist, verification traps, NRI quota reality, and step-by-step counselling flow. Designed to prevent last-minute rejections and wrong choice filling.
Get a short diagnostic report, study roadmap: syllabus gaps (NCERT vs U.S. curriculum), weak chapters, and the exact weekly plan needed to improve accuracy under time. This trial session help you access your NEET exam preparation preparedness and set up your starting goal.
These are the definitions NEET examination will expects you to recognize inside options. Don’t memorize as a single line only understand the meaning, then remember the exact idea NEET tests.
Definition: Metabolism is the sum of all chemical reactions occurring inside a living organism, including anabolism (building complex molecules) and catabolism (breaking down molecules).
Definition: Homeostasis is the ability of an organism to maintain a stable internal environment within a narrow range despite external changes.
Definition: Growth is an increase in mass/size. In living organisms it is usually internal and involves cell division, but growth alone is not always defining for life.
Definition: Reproduction is the process of producing offspring. It ensures continuity of the species, but it is not a defining property for every individual organism.
Each subtopic below is written in a way that a new student can learn it from scratch, and a repeating student can revise quickly. Read the paragraph, then read the NEET framing box.
Living organisms show an ordered structure, not random mixing. This means even if both living and non-living are made of atoms, a living organism has organized levels (cell → tissue → organ). NEET tests this by giving statements where students confuse “made of chemicals” with “organized into functional units.”
All living organisms are made of cells. Some organisms are single-celled (Amoeba), while others are multi-celled (humans). This is asked in NEET through examples and “cell is the basic unit of life” statements. Be careful: viruses are an exception-type area in other chapters, but for this topic your focus is on cellular organisms.
Metabolism is the strongest scoring subtopic because it turns into multiple MCQ patterns: meaning of metabolism, types of reactions, and incorrect option spotting. The key is to remember that metabolism is a set of reactions—some release energy, some require energy. Students lose marks when they assume “metabolism = energy release only.”
Homeostasis is regulation keeping internal conditions within limits. NEET tests homeostasis through sentence wording: “stable” vs “constant.” Many students lose marks because they interpret homeostasis as “no change at all,” which is incorrect. Real biology is controlled fluctuation.
Movement means any change in position of body parts, and it can happen in plants as well. Locomotion means moving from one place to another, and it is not seen in all organisms. NEET traps by writing “all living organisms show locomotion” or “plants do not show movement.”
Reproduction ensures continuity of species, but not every individual reproduces. This is one of NEET’s favorite “NOT defining” questions. Students make the mistake of choosing reproduction because it feels strongly connected to life. NEET wants you to think like a biologist, not like a poet.
NEET doesn’t only test your knowledge it tests your reading discipline. Most mistakes happen when students read fast and miss a single word like “only,” “always,” “except,” or “not.” Use the trap patterns below as a checklist while solving MCQs.
Solve these with exam discipline: read the question carefully, underline the keyword (NOT/EXCEPT/ONLY), choose an option, then read the explanation and write a 1-line “trap note” if you got it wrong.
A student says: “Reproduction is the most important feature of living organisms, therefore it is the defining property of life.” Which option best corrects this statement according to NEET/NCERT logic?
Consider the statements:
I. All living organisms show locomotion at some stage of life.
II. All living organisms show movement, though the type of movement may differ.
Choose the correct option.
A student marks “growth” as the best defining feature of life because “living organisms grow, non-living do not.” Which explanation best identifies the mistake and fixes the concept?
Homeostasis is best described as:
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