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Control and Coordination for Class 10: The Complete CBSE Guide (2026-27)

Control and coordination class 10 is Chapter 7 in the NCERT Science textbook and a high-weightage topic in the CBSE board exam. Every living organism must sense its environment and respond appropriately — a plant bends toward light, a hand jerks away from a hot surface, blood sugar is regulated after a meal. These processes are controlled by two systems: the nervous system (fast, electrical signals via neurons) in animals, and chemical coordination via hormones in both plants and animals. This chapter introduces the structure of the neuron, reflex actions, the human brain and its parts, five major plant hormones and their roles in tropisms, and the key endocrine glands in humans along with their hormones and functions. Understanding control and coordination class 10 is essential not only for board exam success but also for competitive exams like NEET and for grasping how our own body maintains homeostasis.

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Key takeaways

  • ✓Control and coordination class 10 covers nervous system, reflex actions, plant hormones and animal endocrine glands as per NCERT.
  • ✓The reflex arc is the fastest pathway: receptor → sensory neuron → spinal cord → motor neuron → effector, bypassing the brain.
  • ✓Plant hormones (auxin, gibberellin, cytokinin, abscisic acid) control growth, tropisms and responses; they are chemical coordinators in plants.
  • ✓Animal hormones are secreted by endocrine glands (ductless) directly into the bloodstream; examples include insulin (pancreas), thyroxine (thyroid), adrenaline (adrenal).
  • ✓Nervous coordination is fast and short-lived; hormonal coordination is slower but lasts longer — both are tested in CBSE board exams.
  • ✓Diagrams of neuron structure, reflex arc and the human brain are high-scoring must-draw items worth 3–5 marks each.
  • ✓Tropisms (phototropism, geotropism, chemotropism, hydrotropism, thigmotropism) are directional growth movements in plants mediated by auxin redistribution.

What Is Control and Coordination? (Basic Concepts)

Control and coordination refer to the ability of an organism to detect stimuli (changes in the environment) and produce appropriate responses to maintain life and adapt. In animals, coordination is achieved primarily through the nervous system and the endocrine system. The nervous system uses electrical impulses that travel along neurons for rapid, short-term responses. The endocrine system uses hormones (chemical messengers) secreted into the blood for slower, longer-lasting effects. Plants lack a nervous system but coordinate their growth and responses using plant hormones synthesized in specific regions and transported to target tissues. Both systems are complementary: the nervous system handles immediate dangers (like touching fire), while hormones regulate processes like growth, metabolism and reproduction. In the CBSE Class 10 Science syllabus, this chapter is crucial because it integrates concepts from biology with real-life examples — students learn why they blink when dust enters the eye (reflex action), why plants grow toward sunlight (phototropism mediated by auxin), and how insulin controls blood glucose. Mastery of control and coordination class 10 concepts builds the foundation for advanced topics in Class 11 such as neural control, chemical coordination and the human endocrine system.
  • Stimulus: Any change in the environment (light, heat, touch, chemical) that is detected by receptors.
  • Response: The action taken by an organism in reaction to a stimulus, carried out by effectors (muscles or glands).
  • Coordination: The process of integrating stimulus detection and response execution so the organism acts as a whole.
  • Two main systems in animals: nervous (fast, electrical) and endocrine (slow, chemical); plants use only chemical coordination.

The Nervous System in Animals (Structure and Function)

The nervous system in animals consists of specialized cells called neurons that transmit electrical impulses. A neuron has three parts: the cell body (contains nucleus), dendrites (receive signals from other neurons or receptors), and an axon (a long fiber that carries the impulse away from the cell body to the next neuron or effector). The end of the axon has nerve endings that release chemical messengers called neurotransmitters into the synapse (gap between two neurons). In humans, the nervous system is divided into the central nervous system (CNS: brain and spinal cord) and the peripheral nervous system (PNS: all nerves outside CNS). The CNS processes information and decides responses; the PNS carries signals to and from the CNS. Sensory neurons carry impulses from receptors (in skin, eyes, ears) to the CNS. Motor neurons carry commands from the CNS to effectors (muscles or glands). The brain is the main control center, with three major regions: forebrain (thinking, memory, sensory processing — includes cerebrum), midbrain (controls reflex movements of eye and head), and hindbrain (controls involuntary actions like heartbeat, breathing — includes cerebellum for balance and medulla for vital functions). Understanding neuron structure and brain regions is essential for control and coordination class 10 because these diagrams are frequently asked in board exams for 3–5 marks.
  • Neuron structure: dendrites → cell body → axon → nerve endings; myelin sheath insulates axon for faster conduction.
  • Synapse: junction between two neurons; impulse crosses via neurotransmitters (chemicals), ensuring one-way transmission.
  • CNS: brain (cerebrum, cerebellum, medulla) + spinal cord; PNS: cranial and spinal nerves.
  • Cerebrum: controls voluntary actions, intelligence, memory; cerebellum: balance and posture; medulla: breathing, heartbeat, blood pressure.
  • Spinal cord: conducts signals between brain and body; also the center for reflex actions (see next section).

Reflex Action and Reflex Arc (High-Scoring Topic)

A reflex action is a rapid, automatic, involuntary response to a stimulus that does not involve conscious thought. It is the fastest form of coordination in animals. Examples include withdrawing your hand when you touch a hot object, blinking when an object comes close to your eye, or the knee-jerk when the tendon is tapped. The pathway of a reflex action is called the reflex arc: receptor (in skin, muscle, etc.) → sensory neuron → spinal cord (or lower brain region) → motor neuron → effector (muscle or gland). Crucially, the reflex arc bypasses the brain for speed — the spinal cord alone integrates the signal and sends the command. The brain is informed later, which is why you feel the pain after you have already pulled your hand away. This mechanism protects the body from harm. In CBSE exams, students must draw and label the reflex arc diagram and explain each step. A common 3-mark or 5-mark question is 'Draw a labelled diagram of reflex arc and explain reflex action.' Reflex actions are mediated by the nervous system, not hormones, because speed is critical. Understanding reflex action is a foundation of control and coordination class 10 notes, and it appears in nearly every board exam paper.

Plant Hormones (Phytohormones) and Their Functions

Plants do not have a nervous system, so they rely entirely on chemical coordination through plant hormones (also called phytohormones). These hormones are synthesized in one part of the plant and transported to other parts where they regulate growth, development and responses to stimuli. The five major plant hormones covered in control and coordination class 10 are: (1) Auxin — promotes cell elongation, responsible for phototropism (bending toward light) and geotropism (root growth toward gravity); synthesized in shoot tips. (2) Gibberellin — promotes stem elongation, seed germination and flowering. (3) Cytokinin — promotes cell division, delays aging of leaves. (4) Abscisic acid (ABA) — stress hormone, promotes stomatal closure during water shortage, inhibits growth. (5) Ethylene (not always emphasized in NCERT but worth knowing) — promotes fruit ripening. Auxin is the most important for exams because it explains tropisms. When light falls on one side of a plant shoot, auxin accumulates on the shaded side, causing those cells to elongate more, so the shoot bends toward light. In roots, higher auxin concentration inhibits growth, so roots bend away from light (negative phototropism). CBSE questions often ask: 'Name the plant hormone responsible for phototropism and explain its role' or 'Why do shoots and roots respond differently to auxin?' Mastery of plant hormones is essential for scoring in control and coordination class 10.

Tropisms in Plants (Directional Growth Movements)

A tropism is a directional growth movement of a plant part in response to an external stimulus. The direction of growth is determined by the direction of the stimulus. Tropisms are mediated by plant hormones, especially auxin. The major tropisms in control and coordination class 10 are: (1) Phototropism — growth toward (positive) or away (negative) from light; shoots show positive phototropism, roots show negative phototropism. (2) Geotropism (gravitropism) — growth in response to gravity; roots show positive geotropism (grow downward), shoots show negative geotropism (grow upward). (3) Hydrotropism — growth toward water; roots exhibit positive hydrotropism. (4) Chemotropism — growth in response to chemicals; pollen tube grows toward ovule due to chemicals. (5) Thigmotropism — growth in response to touch; seen in tendrils of climbing plants that coil around support. Tropisms are slow because they involve changes in growth rate, unlike the rapid responses of the nervous system. CBSE exam questions often ask students to differentiate between phototropism and geotropism, or to explain the role of auxin in phototropism. A 2-mark question might be: 'What is phototropism? Name the hormone responsible.' A 5-mark question could ask for a detailed explanation with a diagram showing auxin distribution in a shoot exposed to unidirectional light.
  • Positive tropism: growth toward the stimulus; negative tropism: growth away from the stimulus.
  • Phototropism is caused by unequal distribution of auxin — more auxin on shaded side → more elongation → bending toward light.
  • Geotropism in roots: auxin inhibits growth on lower side → upper side grows more → root bends downward.
  • Thigmotropism example: tendrils of pea plant coil around a stick due to differential growth when they touch it.
  • Tropisms are irreversible growth movements; nastic movements (like folding of Mimosa leaves) are reversible and non-directional.

The Endocrine System and Hormones in Animals

The endocrine system consists of ductless glands that secrete hormones directly into the bloodstream. Hormones are chemical messengers that travel through blood to target organs and regulate various physiological processes. Unlike the nervous system, hormonal responses are slower but longer-lasting. The major endocrine glands in humans (as per NCERT for control and coordination class 10) are: (1) Pituitary gland (master gland) — secretes growth hormone (controls body growth), and other hormones that regulate other glands. (2) Thyroid gland — secretes thyroxine (regulates metabolism, growth, mental development); requires iodine; deficiency causes goiter. (3) Pancreas — secretes insulin (lowers blood glucose) and glucagon (raises blood glucose); insulin deficiency causes diabetes. (4) Adrenal glands — secrete adrenaline (prepares body for fight-or-flight response: increases heart rate, blood pressure, breathing rate). (5) Testes (males) — secrete testosterone (male secondary sexual characters). (6) Ovaries (females) — secrete estrogen and progesterone (female secondary sexual characters, menstrual cycle). Feedback mechanisms regulate hormone secretion: for example, high blood sugar triggers insulin release, which lowers sugar; low sugar stops insulin secretion. CBSE board exams regularly ask 5-mark questions like 'Name the endocrine glands and their hormones with one function each' or 'Explain the role of pancreas in blood sugar regulation.' This section is critical for control and coordination class 10.

Differences Between Nervous and Hormonal Coordination

A very common exam question in control and coordination class 10 is to compare nervous and hormonal coordination. Both systems coordinate body functions, but they differ in mechanism, speed, duration and nature of response. Nervous coordination uses electrical impulses conducted by neurons; it is very fast (milliseconds to seconds), precise (targeted to specific muscles or organs), and short-lived (response stops quickly when stimulus is removed). Examples include reflex actions, voluntary movements, sensory perception. Hormonal coordination uses chemical messengers (hormones) secreted into the blood; it is slower (seconds to hours because hormones must travel via circulation), more diffuse (hormones affect multiple organs), and longer-lasting (effects persist even after hormone secretion stops). Examples include growth, metabolism, reproduction, stress response. The two systems often work together: for instance, the nervous system detects danger and signals the adrenal gland to release adrenaline (hormonal response). In exams, this is typically a 3-mark or 5-mark tabular question. Students should prepare a clear table with points on speed, medium of transmission, duration, and examples. Understanding these differences is fundamental to mastering control and coordination class 10 concepts.

Diagram-Based Questions (Neuron, Reflex Arc, Brain)

Diagram questions are high-scoring opportunities in control and coordination class 10 board exams. Three diagrams are most frequently asked: (1) Structure of a neuron — must label dendrites, cell body, nucleus, axon, myelin sheath, nerve endings. (2) Reflex arc — must show receptor, sensory neuron, spinal cord (with interneuron), motor neuron, effector (muscle), and indicate direction of impulse with arrows. (3) Human brain (sagittal section) — must label cerebrum, cerebellum, medulla, pons, midbrain, and mention one function of each. Each diagram typically carries 3 or 5 marks. Students lose marks due to incorrect labeling, missing arrows, or not writing functions. Practice drawing these diagrams neatly and accurately. Use a sharp pencil, draw proportionate parts, and write labels horizontally outside the diagram with straight label lines (not arrows). In the 2024-25 board exam, a 5-mark question was: 'Draw a well-labelled diagram of reflex arc. Explain the pathway of reflex action when you touch a hot object.' Such questions reward both diagram accuracy and conceptual clarity. Spending time mastering these three diagrams is one of the smartest ways to secure marks in control and coordination class 10.
  • Neuron diagram: clearly distinguish dendrites (multiple, short) from axon (single, long); show myelin sheath gaps (nodes of Ranvier).
  • Reflex arc: always draw arrows showing impulse direction: receptor → sensory → spinal cord → motor → effector.
  • Brain diagram: cerebrum (largest, top), cerebellum (below cerebrum, back), medulla (lowest, connects to spinal cord).
  • Write one function next to or below each labeled part to score full marks if the question asks for functions.

Common Mistakes Students Make in Control and Coordination Class 10

Even strong students make predictable errors in control and coordination class 10 exams. First, confusing nervous and hormonal systems: writing that reflex actions are controlled by hormones (wrong — they are purely nervous), or that growth is controlled by neurons (wrong — it is hormonal). Second, mixing up plant hormones: stating that gibberellin causes phototropism (it is auxin), or that auxin closes stomata (it is abscisic acid). Third, incomplete reflex arc diagrams: forgetting to show the interneuron in the spinal cord, or not drawing arrows to indicate impulse direction. Fourth, vague answers about hormone functions: writing 'insulin controls sugar' without specifying it lowers blood glucose, or 'thyroxine helps in growth' without mentioning it regulates metabolism and requires iodine. Fifth, not writing scientific terms correctly: 'homones' instead of hormones, 'nurves' instead of nerves, 'pitutary' instead of pituitary. Sixth, in long answers, students write the same point twice (e.g. 'auxin promotes growth' and 'auxin helps plant grow') instead of adding a new point — this does not earn extra marks. To avoid these mistakes, rely on NCERT language, practice past-year board questions, and have your answers checked by a teacher or AI tutor. CBSETUTOR.ai allows students to upload handwritten answers via photo and get instant feedback on errors, missing keywords and better phrasings — at just ₹999/month for all subjects, Classes 6–12, with a 3-day free trial and no credit card required.
  • Always specify which hormone or part of nervous system is responsible; avoid vague statements.
  • In tropism questions, mention auxin by name and explain its unequal distribution.
  • In reflex arc, never say the brain is involved in the immediate response — it is informed later.
  • For endocrine glands, write both the gland name and the hormone it secretes; do not assume the examiner will infer.
  • Spell scientific terms correctly; CBSE marking schemes deduct marks for repeated spelling errors in key terms.

Important Questions for CBSE Board Exams (2024-25 Pattern)

Control and coordination class 10 important questions are predictable because NCERT content is finite and board exams follow a set blueprint. One-mark MCQs typically test definitions and facts: 'Which hormone regulates blood sugar?', 'What is the gap between two neurons called?', 'Name the plant hormone that promotes cell division.' Two-mark questions ask for definitions with examples: 'Define reflex action. Give one example.', 'What is phototropism? Name the hormone responsible.' Three-mark questions require short explanations or comparisons: 'Differentiate between sensory and motor neurons.', 'Explain the role of auxin in phototropism.', 'Name three endocrine glands and their hormones.' Five-mark questions demand detailed answers with diagrams: 'Draw and explain the reflex arc.', 'Describe the structure of a neuron with a labelled diagram.', 'Explain how plant hormones coordinate growth and movement in plants.' In the 2023-24 board exam, a popular 5-mark question was: 'Explain the coordination in plants with the help of examples of tropism.' Another was: 'Draw the structure of neuron and explain how nerve impulse travels.' Students should practice writing answers within the word limit (5-mark answer should be about 100–120 words plus diagram). Past-year papers from 2020–2024 show that reflex action, neuron diagram, and plant hormones appear almost every year. Practicing these questions is the single best strategy to excel in control and coordination class 10.

Quick Revision Notes and Formulas (If Any)

Control and coordination class 10 is largely conceptual, so there are no mathematical formulas. However, there are key points and mnemonics that help in quick revision. For plant hormones, remember 'A-G-C-A': Auxin (growth, tropism), Gibberellin (germination, stem elongation), Cytokinin (cell division), Abscisic acid (stress, stomatal closure). For reflex arc pathway, use 'R-S-I-M-E': Receptor → Sensory neuron → Interneuron (spinal cord) → Motor neuron → Effector. For major endocrine glands, remember 'P-T-P-A-T-O': Pituitary (growth hormone), Thyroid (thyroxine), Pancreas (insulin), Adrenal (adrenaline), Testes (testosterone), Ovaries (estrogen). For brain parts and functions: Cerebrum (thinking, memory), Cerebellum (balance), Medulla (breathing, heartbeat). Write these down on a revision card and review the night before the exam. Also memorize one example for each concept: phototropism = shoot bending toward light; reflex action = hand withdrawal from hot object; insulin function = lowers blood glucose; thyroxine deficiency = goiter. In the exam, if you forget details, recall the example and build your answer around it. These quick notes are enough to secure 6–7 out of 8 marks if you can write clearly and draw diagrams neatly. For personalized quick-revision summaries and instant doubt clearing, CBSETUTOR.ai can generate custom notes from any NCERT chapter and answer follow-up questions 24×7 — a huge advantage during late-night study sessions.
  • Neuron parts mnemonic: 'D-C-A-N' (Dendrites, Cell body, Axon, Nerve endings).
  • Reflex arc: always moves in one direction due to synapse structure (neurotransmitters released only from axon end).
  • Auxin: promotes growth in shoots (positive phototropism), inhibits growth in roots (negative phototropism).
  • Hormones are secreted in small amounts; their effect is amplified at target organs via receptors.
  • Feedback mechanism example: high glucose → insulin secretion → glucose drops → insulin secretion stops (negative feedback).

How to Score Full Marks in Control and Coordination Class 10

To score 8/8 in this chapter, follow this strategy. First, read the NCERT textbook thoroughly — every sentence in the main text and even the 'In-text Questions' and 'Exercises' at chapter end. CBSE examiners lift questions and language directly from NCERT. Second, practice drawing all three major diagrams (neuron, reflex arc, brain) at least ten times each until you can draw them perfectly in under three minutes. Third, make a chart of all hormones (plant and animal) with their source and function; this is a common 3-mark or 5-mark table question. Fourth, memorize definitions word-for-word from NCERT: reflex action, tropism, synapse, hormone, receptors, effectors. Fifth, solve at least 5 years of board exam papers (2020–2024) and sample papers released by CBSE. Sixth, write your answers in points, not long paragraphs — examiners prefer clear, numbered points that are easy to evaluate. Seventh, underline key terms (auxin, insulin, reflex arc, synapse, cerebellum) in your answer — it shows you know the scientific vocabulary. Eighth, in diagram-based questions, always write one function for each labeled part unless the question says otherwise. Ninth, if a question asks 'Explain with example', always give a real example (phototropism in shoot, withdrawal reflex). Tenth, manage time: spend no more than 8–10 minutes on a 5-mark question. Finally, consider using CBSETUTOR.ai to simulate exam conditions: upload your handwritten answer as a photo, and the AI will score it, highlight missing points, and suggest improvements based on actual CBSE marking schemes. At ₹999/month flat for Classes 6–12, it is a cost-effective way to get personalized feedback without expensive tuition.
  • Read NCERT chapter twice: once for understanding, once for memorizing key terms and definitions.
  • Create a separate formula/concept sheet for quick revision one day before exam.
  • Practice previous year questions under timed conditions; aim to finish 5-mark answer in 8 minutes including diagram.
  • Use black or blue pen for text, sharp pencil for diagrams; do not use sketch pens or color pencils in boards.
  • In case-based questions, read the passage carefully and underline facts that connect to NCERT content before answering.

Resources and Tools for Mastering This Chapter

The primary resource for control and coordination class 10 is the NCERT Science textbook (Chapter 7, titled 'Control and Coordination'). Download the latest PDF from ncert.nic.in if you do not have the printed book. Supplement this with NCERT Exemplar for additional MCQs and HOTS (Higher Order Thinking Skills) questions. For video explanations, official DIKSHA app by NCERT has chapter-wise videos; prefer those over random YouTube channels to avoid misinformation. Oswaal and Arihant Question Banks provide chapter-wise previous year questions with solutions. Practice sample papers released by CBSE on cbseacademic.nic.in — these are designed by board examiners and reflect the exact difficulty level. For diagram practice, use blank A4 sheets and draw repeatedly; compare your diagrams with NCERT figures. If you are stuck on a specific concept or need instant clarification at odd hours, CBSETUTOR.ai is the only 24×7 AI tutor trained on the full NCERT curriculum for Classes 6–12. You can type or upload a photo of any question — even handwritten notes or worksheets from school — and get a step-by-step NCERT-aligned answer. It runs on one flat fee of ₹999/month for all subjects and classes, with a 3-day free trial (no credit card needed), making it far more affordable than traditional tuition (₹3,000–₹8,000/month per subject). This is especially helpful for students in smaller towns or those who study late at night when teachers are unavailable. Use these tools strategically, and control and coordination class 10 will become one of your highest-scoring chapters.
  • NCERT textbook Chapter 7: mandatory first resource; read the 'What you have learnt' summary at the end.
  • NCERT Exemplar: has MCQs and short-answer questions that are slightly tougher than board exams — good for NTSE/Olympiad prep too.
  • DIKSHA app: free official app with chapter videos and quizzes; no ads, directly from NCERT.
  • CBSE official sample papers and marking schemes: available free on cbseacademic.nic.in every November for current academic year.
  • CBSETUTOR.ai: upload diagrams to check correctness, ask why a particular answer is wrong, or get alternate phrasings for better marks.

Frequently asked questions

Which topics in control and coordination class 10 carry the most marks in CBSE boards?+
Reflex arc and neuron diagrams (usually 5 marks), plant hormones and tropisms (3–5 marks), and the table of endocrine glands with hormones (3–5 marks) are the highest-scoring topics. Together, they account for about 12–15 marks if you include related MCQs. Practice these thoroughly.
Is the brain diagram asked every year in control and coordination class 10 exams?+
Not every year, but it appears frequently — roughly in 3 out of 5 years based on past papers. When asked, it is usually a 3-mark question asking you to draw and label the human brain and mention functions of cerebrum, cerebellum and medulla. Always prepare it to be safe.
How is auxin responsible for phototropism — will this be asked as a long answer?+
Yes, this is a classic 3-mark or 5-mark question. You must explain: auxin is synthesized in shoot tip; when light comes from one side, auxin migrates to the shaded side; cells on shaded side elongate more due to higher auxin; this causes the shoot to bend toward light. Include a simple diagram showing unequal auxin distribution to score full marks.
What is the difference between reflex action and voluntary action?+
Reflex action is automatic, fast, and controlled by the spinal cord without conscious thought (example: hand withdrawal from hot object). Voluntary action is conscious, slower, and controlled by the brain (example: picking up a pen). Reflex actions bypass the brain to save time and prevent injury. This is a common 2-mark question.
Do I need to memorize all the functions of every hormone in control and coordination class 10?+
You should memorize one main function for each hormone. For example: insulin lowers blood glucose, thyroxine regulates metabolism, adrenaline prepares body for emergency, auxin causes phototropism, abscisic acid closes stomata. Examiners do not expect you to list five functions per hormone at Class 10 level; one clear function with correct gland name is enough.
Can I score full marks if I write only points and no paragraph in long answers?+
Yes, CBSE marking schemes award marks for correct points, not essay-style writing. In fact, point-wise answers are preferred because they are easier for examiners to evaluate. For a 5-mark answer, write 5–6 clear points (each point = 1 mark). Just ensure each point is a complete sentence, not a single word.
What happens if I draw the reflex arc diagram but forget to put arrows?+
You will lose at least 1 mark out of 5. Arrows showing direction of nerve impulse (receptor → sensory → spinal cord → motor → effector) are essential because they demonstrate that you understand the pathway is unidirectional. Always double-check your diagram before moving to the next question.
Is there any formula or numerical in control and coordination class 10?+
No, this chapter is purely conceptual and descriptive. There are no mathematical calculations, formulas or numericals. Focus on definitions, diagrams, functions of hormones and glands, and understanding processes like reflex action and tropisms. This makes it a scoring chapter if you memorize well.
Why do shoots and roots respond oppositely to auxin during geotropism?+
In shoots, higher auxin concentration promotes cell elongation, so shoots grow away from gravity (negative geotropism). In roots, higher auxin concentration inhibits growth, so roots grow toward gravity (positive geotropism). This differential sensitivity to auxin is a NCERT-highlighted point and often appears as a 2-mark 'Why' question in exams.
How much time should I spend on control and coordination class 10 in my study plan?+
Allocate about 6–8 hours total for this chapter: 2 hours for first reading and understanding, 2 hours for practicing diagrams, 2 hours for solving important questions and previous year papers, and 1–2 hours for revision. It is a moderate-length chapter, less content-heavy than chapters like Heredity or Life Processes, but diagram-intensive.
Will CBSE ask about ethylene or other plant hormones not in NCERT?+
No. CBSE strictly follows NCERT content. The NCERT Class 10 Science textbook mentions only auxin, gibberellin, cytokinin and abscisic acid. Ethylene is introduced in Class 11. Do not waste time studying hormones outside NCERT for board exams. Stick to the textbook for guaranteed scoring.
Can CBSETUTOR.ai help if I am weak in drawing diagrams for control and coordination class 10?+
Yes. You can draw the diagram on paper, take a photo, and upload it to CBSETUTOR.ai. The AI will analyze your diagram, point out missing labels or incorrect parts, and show you a reference diagram from NCERT. It also provides tips on neatness and proportion. This instant feedback loop is much faster than waiting for a teacher to check your notebook. Try the 3-day free trial at ₹999/month for all classes and subjects.

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