🧬 जीव विज्ञान (Biology)

📌 0. Exam Pattern & 2025 Analysis (2 min read)

• Science ke 10 sawal: Physics 4 + Chemistry 3 + Biology 3. Official 2025 paper (16–21 Jan 2026, 12 shifts) mein 36 Biology sawal the — inme se 35 yahan diye hain.
• Topic-wise: Plant reproduction/physiology/agriculture — 6 | Human reproduction & contraception — 5 | Plant anatomy & tissues — 4 | DNA/genetics/evolution — 4 | Cell — 3 | Human systems — 3 | Biomolecules/enzymes — 3 | Biotechnology — 3 | Ecology — 2 | Hormone feedback — 1 | STD — 1.
• ⚠️ Kai sawal NCERT class 11-12 ke the (syngamy, microsporogenesis, phosphodiester bond, 0.34 nm, hypodermis collenchyma, flagship species). Class 6-10 ke basic facts (vitamin, rog, blood group) bhi pakke rakho — MP ki purani police/Vyapam parikshaon mein ye bahut pooche gaye hain.

📌 1. कोशिका (Cell) (7 min read)

1.1 खोज व कोशिका सिद्धांत

• Koshika = jeevan ki rachnatmak aur kaaryaatmak ikai (structural & functional unit).
• Robert Hooke (1665) — cork ki patli parat mein mrit koshikaayen dekhi, naam "cell" diya. Leeuwenhoek — pehli baar jeevit koshikaayen (bacteria, protozoa) dekhi.
• Robert Brown (1831) — kendrak (nucleus) khoja.
• Koshika siddhant: Schleiden (1838, paudhe) aur Schwann (1839, jantu); Virchow (1855) ne joda — "Omnis cellula-e cellula" (har koshika poorv koshika se banti hai).
• Sabse chhoti koshika: Mycoplasma (PPLO). Sabse badi: shuturmurg (ostrich) ka anda. Manav sharir mein sabse lambi: neuron (tantrika koshika).

1.2 प्रोकैरियोटिक vs यूकैरियोटिक

1.3 कोशिकांग (Organelles)

1.4 कोशिका विभाजन (Cell Division)

• समसूत्री (Mitosis): kaayik (somatic) koshikaaon mein; 1 → 2 samaan dvigunit (2n) koshikaayen; vriddhi aur marammat.
• अर्धसूत्री (Meiosis): janan koshikaaon mein; 1 → 4 agunit (n) koshikaayen (yugmak/gametes); chromosome sankhya aadhi; vividhata (crossing over).

📌 2. ऊतक व पादप आंतरिक संरचना (Tissues & Plant Anatomy) (8 min read)

2.1 पादप ऊतक (Plant Tissues)

• विभज्योतक (Meristematic): lagaataar vibhaajit — sheersh (apical) — jad/tane ki nok, lambaai badhana; paarshv (lateral) — cambium, motaai badhana; antarvesh (intercalary) — ghaas ki gaanth (node) ke paas.
• स्थायी (Permanent) — सरल:
  • मृदूतक (Parenchyma) — patli deewar, jeevit, bhojan sangrah; hare = chlorenchyma; hawa ki jagah wala = aerenchyma (jaleey paudhe tairte hain).
  • स्थूलकोण ऊतक (Collenchyma) — jeevit, konon par moti deewar (cellulose/pectin); lacheelapan (flexibility); patti ke dant (petiole), dvibeejpatri tane ki hypodermis.
  • दृढ़ोतक (Sclerenchyma) — mrit, lignin se moti deewar; majbooti — nariyal ka chhilka (husk), jute; ekbeejpatri tane ki hypodermis.
• जटिल (Complex):
  • जाइलम (Xylem) — paani va khanij, jad se upar (ek disha); tracheids, vahikaayen (vessels), xylem parenchyma, xylem fibre. Ped ki umra ke vaarshik valay (annual rings) = xylem ki parten (dendrochronology).
  • फ्लोएम (Phloem) — bhojan (patti se sabhi bhaagon tak, dono dishaon mein); chaalni nalikaayen (sieve tubes), sahcharikoshikaayen (companion cells).

2.2 द्विबीजपत्री तना व जड़ (Dicot Stem & Root)

• Dicot tana (bahar se andar): epidermis (upar cuticle) → valkut (cortex) [hypodermis (collenchyma) → general cortex (parenchyma) → antastvacha (endodermis)] → parirambh (pericycle) → samvahan bandal (vascular bundles, chhalle/ring mein, cambium ke saath = "open") → majja (pith).
• Monocot tane mein bandal bikhre hue (scattered), cambium nahi, hypodermis sclerenchyma.
• Jad ke kshetra (nok se upar): moolgop (root cap) — suraksha → koshika vibhaajan (meristematic) → deerghan (elongation) → paripakvan (maturation) — yahin moolroom (root hairs) jo paani sokhte hain.
• रंध्र (Stomata) — patti ki epidermis (mukhyatah nichli satah) mein chhote chhidra; do dvaar koshikaayen (guard cells) kholti/band karti hain → vaashpotsarjan (transpiration) aur gas vinimay. Cuticle (waxy parat) paani ka nuksaan rokti hai.

2.3 जंतु ऊतक (Animal Tissues)

📌 3. जीवों का वर्गीकरण (Classification) (6 min read)

• Carolus Linnaeus — dvinaam paddhati (binomial nomenclature); "vargikee ke janak". Pehla shabd genus (bada akshar), doosra species — italic mein. Manav = Homo sapiens.
• Padanukram (Hierarchy): Jagat (Kingdom) → Sangh/Prabhag (Phylum/Division) → Varg (Class) → Gan (Order) → Kul (Family) → Vansh (Genus) → Jaati (Species). Species = moolbhoot ikai.
• R.H. Whittaker (1969) — 5 jagat: Monera (bacteria), Protista (Amoeba, Euglena), Fungi (kavak — mushroom, yeast), Plantae, Animalia.
• Virus: akoshikeey; sirf jeevit koshika (host) ke andar gunan — sajeev-nirjeev ke beech. Khoj: Ivanowsky (1892), tobacco mosaic virus.

📌 4. पादप कार्यिकी, जनन व कृषि (Plant Physiology, Reproduction & Agriculture) (10 min read)

4.1 प्रकाश संश्लेषण व श्वसन

• Prakash sanshleshan: 6CO₂ + 12H₂O —(prakash, chlorophyll)→ C₆H₁₂O₆ + 6O₂ + 6H₂O. Chloroplast mein. Chlorophyll mein magnesium (Mg). Nikalne wali O₂ paani se aati hai (CO₂ se nahi). Prakash urja → rasaayanik urja.
• Shwasan: glucose ka oxidation → urja (ATP). Vaayveey (aerobic): CO₂ + H₂O + zyada urja (mitochondria). Avaayveey: yeast mein ethanol + CO₂ (kinvan/fermentation — bread, sharaab); maaspeshi mein lactic acid (thakaan, cramp).
• Vaashpotsarjan (Transpiration): stomata se paani ka vaashp banna → paudhe ko thandak aur jad se paani ka khinchaav (transpiration pull).

4.2 पादप हार्मोन (Plant Hormones)

• Anuvartan (tropism): prakash — tana prakash ki ore (+), jad door; gurutv — jad neeche (+); jal — jad paani ki ore. Chhui-mui (Mimosa) ka sparsh se murjhaana = anukunchan gati (nastic movement), tropism nahi.

4.3 पुष्पी पादपों में जनन (Reproduction in Flowering Plants)

• Phool ke bhaag: baahyadal (sepals), dal (petals), punkesar (stamen = paraagkosh/anther + tantu; nar), stripkesar (pistil/carpel = vartikaagra/stigma + vartika + andaashay/ovary; maada).
• लघुबीजाणुजनन (Microsporogenesis): paraagkosh mein paraagkan (pollen grains) banna. गुरुबीजाणुजनन (Megasporogenesis): beejaand (ovule) mein guru-beejaanu banna.
• परागण (Pollination): paraagkan ka vartikaagra (stigma) tak pahunchna — swa/par; vaahak: hawa, keet, paani, pakshi.
• युग्मक संलयन (Syngamy): nar yugmak + andaanu (egg) ka sanlayan → yugmanaj (zygote, 2n). Aavritbeejiyon mein dohra nishechan (double fertilisation): syngamy + tri-sanlayan (triple fusion) (nar yugmak + 2 dhruviy kendrak → bhroonposh/endosperm, 3n).
• Nishechan ke baad: andaashay → phal, beejaand → beej.
• Paraagkanon ka adhyayan = परागाणु विज्ञान (Palynology). (Shahad mein paraag ka adhyayan = melissopalynology; phalon ki kheti = pomology.)
• Kaayik janan (Vegetative): aaloo (tana kand — "aankhein"), adrak (prakand/rhizome), pyaaz (shalk kand/bulb), Bryophyllum (patti ki kinaaron par kaliyaan).
• Jeevan chakra: ekvarshi (annual) aur dvivarshi (biennial) paudhon mein kaayik, janan aur jeernata (senescent) avasthaayen spasht dikhti hain; bahuvarshi (perennial) mein pehchaanna kathin. Baans jeevan mein ek baar (50–100 saal mein) phool deta hai; Neelakurinji (Strobilanthes kunthiana) 12 saal mein ek baar.

4.4 कृषि (Agriculture — Class 8)

• Kram: mitti taiyaar karna (jutaai/ploughing — mitti ko ulat-palat va bhurbhura karna) → samtal karna → buvaai (sowing) → khaad/urvarak → sinchaai → nirai (weeding) → katai → gahaai (threshing — daane alag karna) → osaai (winnowing — bhusa alag karna) → bhandaran.
• Kharif (varsha, June–Sep): dhaan, makka, soyabean, moongfali, kapas. Rabi (sardi, Oct–March): gehun, chana, matar, sarson, alsi.
• Dalhan (fali wale) paudhon ki jadon ki granthikaaon mein Rhizobium bacteria vaayumandaliya nitrogen sthirikaran karte hain → fasal chakra (crop rotation) se mitti upjaau.

📌 5. मानव शरीर तंत्र (Human Body Systems) (12 min read)

5.1 पाचन तंत्र (Digestive)

• Yakrit = sabse badi granthi (~1.2–1.5 kg). Vayask ke 32 daant; enamel = sharir ka sabse kathor padarth.

5.2 श्वसन तंत्र (Respiratory)

• Naak → grasni (pharynx) → kanth/swar-yantra (larynx — voice box) → shwaas-nali (trachea, C-aakaar upasthi chhalle) → shwasani (bronchi) → shwasanika → koopika (alveoli) — yahan gas vinimay (vistaar se, diffusion).
• Phuphphuseey sanvaatan (Pulmonary ventilation) = shwaas lena-chhodna — bahar ki hawa andar kheenchna aur CO₂-yukt koopika hawa bahar nikaalna. Diaphragm neeche → shwaas andar.
• Vayask ki shwaas dar ~12–16 prati minute. O₂ ka parivahan haemoglobin (lauh yukt) se.
• O₂ aanshik daab (pO₂) lagbhag: koopika ~104, oxygenated rakt / phuphphuseey shira ~95, deoxygenated rakt / ootak ~40 mm Hg.
• ⚠️ Carbon monoxide (CO) haemoglobin se O₂ ki tulna mein kai sau guna zyada majbooti se judta hai (carboxyhaemoglobin) → band kamre mein angeethi/generator se maut — police jaanch mein aam case.

5.3 परिसंचरण तंत्र (Circulatory)

• Hriday: 4 kaksh — 2 alind (atria, upar) + 2 nilay (ventricles, neeche). Dohra parisancharan. Daayan bhaag = O₂-rahit rakt; baayan = O₂-yukt.
• Dhamani (artery) hriday se door; shira (vein) hriday ki ore (vaalv hote hain). Apvaad: phuphphuseey dhamani O₂-rahit rakt, phuphphuseey shira O₂-yukt rakt le jaati hai.
• SA node = pacemaker. Dhadkan ~72/min. Saamanya BP 120/80 mm Hg (sphygmomanometer).

5.4 उत्सर्जन तंत्र (Excretory)

• Vrikk (kidney) — kriyaatmak ikai nephron. Urea yakrit mein banta hai, vrikk use chhaanta hai. Mootra ka peela rang — urochrome. Pathri — aam taur par calcium oxalate. Vrikk kharaab → dialysis.

5.5 तंत्रिका तंत्र (Nervous)

5.6 कंकाल व पेशी तंत्र (Skeletal & Muscular)

• Vayask mein 206 haddiyan (navjaat mein lagbhag 300, baad mein judti hain). Sabse lambi — femur (jaangh); sabse chhoti — stapes (kaan).
• Kankaal peshi fibre mein myofibril hote hain; unki kriyaatmak ikai = sarcomere (do Z-rekhaon ke beech) — actin aur myosin filaments ke khisakne se sankuchan.

📌 6. मानव जनन व गर्भनिरोध (Human Reproduction & Contraception) (8 min read)

• Vrishan (testes) — shukraanu (sperm) + testosterone. Andaashay (ovary) — andaanu (ovum) + estrogen, progesterone.
• Shukraanu aur andaanu dono agunit (haploid, n = 23); yugmanaj (zygote) dvigunit (2n = 46).
• Nishechan — andvahini / fallopian tube (ampulla) mein; ropan (implantation) — garbhaashay (uterus) mein. Garbhkaal ~9 maheene (~280 din).
• Ling nirdhaaran: mahila XX, purush XY → bachche ka ling pita ke shukraanu (X ya Y) se tay.
• Hormone: pituitary ke FSH aur LH ke graahi (receptors) andaashay ki koshikaaon (follicle/granulosa, theca) par. LH surge → ovulation (~14ve din, 28-din chakra). Ovulation ke baad corpus luteum → progesterone (garbhaashay ki deewar banaye rakhta hai). Progesterone girne par maasik dharm.
• Prolactin — doodh banana. Prasav ke baad lagaataar ucch prolactin → ovulation va maasik chakra dabe rehte hain (lactational amenorrhoea). Oxytocin — prasav ke samay garbhaashay sankuchan va doodh ka nishkaasan.

6.1 गर्भनिरोधक विधियाँ (Contraceptives — NCERT Class 12)

• Maasik dharm aage badhaane (postpone) ke liye progesterone/progestin yukt dawaayen (jaise norethisterone) di jaati hain.
• Bharat mein MTP (garbhpaat) kaanoon 1971 mein bana (2021 mein sanshodhan).

📌 7. अंतःस्रावी तंत्र व हार्मोन (Endocrine System) (7 min read)

• Hormone = rasaayanik sandeshvaahak, nalikaviheen (ductless) granthiyon se seedhe rakt mein. Pehla khoja hormone secretin (Bayliss & Starling, 1902).
• Hypothalamus releasing hormones (jaise TRH, GnRH) se pituitary ko niyantrit karta hai. Rinaatmak punarbharan (negative feedback): thyroxine zyada ho to wo TRH aur TSH ko rokta hai.

📌 8. पोषण, विटामिन व खनिज (Nutrition, Vitamins & Minerals) (7 min read)

• Carbohydrate (turant urja, ~4 kcal/g), protein (sharir nirmaan, ~4 kcal/g), vasa (fat) (sabse zyada urja, ~9 kcal/g), vitamin, khanij, paani, rukshaansh (roughage/fibre) — kabz se bachaav.
• Protein kami → kwashiorkor (pet phoolna, soojan); protein + urja (calorie) dono ki kami → marasmus (sookha shareer).
• "Vitamine" shabd: Casimir Funk (1912). Jal-ghulansheel: B aur C (sharir mein jama nahi, roz chahiye). Vasa-ghulansheel: A, D, E, K (trick: "KEDA").

📌 9. रोग, रोगजनक व टीके (Diseases, Pathogens & Vaccines) (10 min read)

9.1 जीवाणु जनित (Bacterial)

DPT teeka = Diphtheria + Pertussis + Tetanus. Aajkal pentavalent = DPT + Hepatitis B + Hib.

9.2 विषाणु जनित (Viral)

9.3 प्रोटोज़ोआ, कवक व कृमि

9.4 टीके, जाँच व दवाएँ

• Edward Jenner — "pratiraksha vigyaan ke janak"; Louis Pasteur — rabies, anthrax teeke; paashchureekaran (pasteurisation).
• Penicillin — pehla antibiotic, Alexander Fleming (1928), kavak Penicillium se. Antibiotic virus par kaam nahi karte.
• Jaanch: Widal — typhoid; ELISA — HIV; Mantoux — TB; Schick — diphtheria.
• Saarvbhaumik Teekakaran Karyakram (UIP) — 1985; Pulse Polio — 1995; Mission Indradhanush — 2014.

📌 10. रक्त व रक्त समूह (Blood & Blood Groups) (6 min read)

• Rakt = taral sanyoji ootak; vayask mein ~5–6 litre; pH ~7.4 (halka kshaareey). Plasma ~55% + koshikaayen ~45%.
• RBC (laal rakt kanika): haemoglobin (lauh) se O₂ parivahan; stanadhaariyon mein kendrak nahi; jeevan ~120 din; asthi majja (bone marrow) mein bante; pleeha (spleen) — "RBC ka kabristaan".
• WBC (shwet rakt kanika): rog se ladna (lymphocyte — antibody). Platelets (bimbanu): thakka jamna (dengue mein girte hain).

10.1 ABO व Rh

• ABO — Karl Landsteiner (1900). Rh factor — Landsteiner & Wiener (1940), rhesus bandar mein pehli baar.

• Rh ko shaamil karke: O⁻ = sarvadaata (universal donor), AB⁺ = sarvagraahi (universal recipient).
• Erythroblastosis foetalis: Rh⁻ maa + Rh⁺ bhroon → doosri garbhavastha mein bhroon ke RBC nasht. Bachaav: pehle prasav ke baad maa ko anti-Rh (anti-D) injection.
• ABO ek gene (I) ke 3 alleles se — bahu-allelism; AB mein sah-prabhaavita (codominance).

📌 11. आनुवंशिकी, DNA व विकास (Genetics, DNA & Evolution) (9 min read)

11.1 मेंडल व गुणसूत्र

• Gregor Mendel — "aanuvanshiki ke janak"; matar (Pisum sativum) par 7 lakshan-yugm. Monohybrid F₂ ratio: lakshan-roop (phenotype) 3 : 1, jeen-roop (genotype) 1 : 2 : 1. Dihybrid: 9 : 3 : 3 : 1.
• Manav mein 46 gunsootra (23 jode) — 22 jode autosome + 1 jodi ling gunsootra (XX/XY).
• Down syndrome — 21ve gunsootra ki trisomy; Turner — XO (mahila); Klinefelter — XXY (purush).
• Haemophilia aur varnaandhata (colour blindness) — X-sahlagn apravaali (X-linked recessive) → purushon mein zyada. Sickle-cell anaemia — autosomal.

11.2 DNA व RNA

• Watson & Crick (1953) — DNA ka dvikundalini (double helix) model (Rosalind Franklin va Wilkins ke X-ray aankdon par).
• Nucleotide = naitrojani kshaar + sharkara + phosphate. Kshaar aur sharkara ke beech N-glycosidic bandh; ek nucleotide ke phosphate aur agle ki sharkara ke 3′-OH ke beech phosphodiester bandh (reedh / backbone).
• DNA kshaar: A, T, G, C; RNA mein T ki jagah U (uracil). Jodi: A = T (2 hydrogen bandh), G ≡ C (3 hydrogen bandh) (Chargaff). DNA mein deoxyribose, RNA mein ribose.
• Double helix: do kshaar-yugmon ke beech doori 0.34 nm; ek chakkar (turn) = 3.4 nm mein ~10 kshaar-yugm.
• Manav Genome Pariyojana 2003 mein poori; ~3 × 10⁹ kshaar-yugm; ~20,000–25,000 gene.
• DNA fingerprinting — Alec Jeffreys; Bharat mein Dr. Lalji Singh ("Bharat mein DNA fingerprinting ke janak", CCMB Hyderabad). CDFD, Hyderabad — apraadh jaanch, pitritva (paternity) vivaad mein upyog.

11.3 विकास (Evolution)

• Lamarck — upaarjit lakshanon ki vanshaagati (jiraaf ki gardan). Darwin — praakritik varan (natural selection), "Origin of Species" (1859). Hugo de Vries — utparivartan (mutation) siddhant.
• Praakritik varan ke prakar: sthaayeekaarak (stabilizing) — madhyam (intermediate) lakshan wale jeev chune jaate hain (jaise janm-bhaar); disha-roopi (directional) — ek chhor; vighatankaari (disruptive) — dono chhor.
• Samjaat (homologous) ang — same utpatti, alag kaam (manav haath, whale ka flipper, chamgadad ka pankh) → apsaari vikas. Samvaridh (analogous) — alag utpatti, same kaam (pakshi va keet ke pankh) → abhisaari vikas.
• Archaeopteryx — sareesrip aur pakshi ke beech ki kadi (connecting link).

📌 12. जैव-अणु व एंजाइम (Biomolecules & Enzymes) (6 min read)

• Carbohydrate: glucose, fructose (phal sharkara, sabse meethi praakritik sharkara), sucrose (cheeni = glucose + fructose), lactose (doodh = glucose + galactose), maltose (glucose + glucose). Bhandaar: paudhon mein starch, jantuon mein glycogen (yakrit, maaspeshi). Cellulose — koshika bhitti; manav pacha nahi sakta.
• Apchaayi (reducing) sharkara — glucose, fructose, maltose, lactose — Fehling/Benedict ko apchayit karti hain (laal avakshep). Sucrose anapchaayi (non-reducing) → Fehling se pehchaan nahi. Starch + iodine → neela-kaala.
• Protein: amino acids peptide bandh se jude; 20 prakar. Sanrachna: praathmik (kram), dvitiyak — α-helix / β-sheet (hydrogen bandh se sthir), tritiyak, chaturthak (haemoglobin). Pehchaan: Biuret test.
• Lipid: fatty acid + glycerol.
• Enzyme: jaiv-utprerak, mukhyatah protein (apvaad: RNA enzyme — ribozyme). Ye sakriyan urja (activation energy) ghataate hain — sankraman avastha (transition state) ko sthir karke. Vishisht (lock & key — Emil Fischer; induced fit — Koshland). Manav mein anukool taap ~37°C; zyada garmi se vikrit (denature).

📌 13. जैव-प्रौद्योगिकी व मानव कल्याण में सूक्ष्मजीव (Biotechnology & Microbes) (6 min read)

• Punarsanyojit DNA (rDNA) takneek: restriction enzyme — "aanvik kainchi" (DNA kaatna), DNA ligase — "aanvik gond" (jodna), vaahak (vector) — plasmid; poshak (host) — E. coli.
• rDNA se bana pehla manav hormone — insulin (Humulin, Eli Lilly/Genentech, 1982). Pehle insulin gaay/suar ke pancreas se nikaala jaata tha.
• GM fasal: Flavr Savr tamatar (1994, USA) — pehli vyavsaayik roop se ugaai gayi GE khaadya fasal (der tak taaza). Bt cotton — Bacillus thuringiensis ke cry gene, bollworm se suraksha; Bharat mein 2002 mein vyavsaayik kheti ki manzoori wali pehli GM fasal. Golden rice — vitamin A (β-carotene). Bt baingan par Bharat mein 2010 se rok (moratorium).
• Dolly bhed (1996) — vayask kaayik koshika se pehla klon stanadhaari.

📌 14. पारिस्थितिकी व जैव-विविधता (Ecology & Biodiversity) (8 min read)

14.1 पारितंत्र (Ecosystem)

• "Ecology" shabd — Ernst Haeckel; "Ecosystem" shabd — A.G. Tansley (1935).
• Ghatak: utpaadak (hare paudhe) → upbhokta (shaakaahaari = praathmik, maansaahaari = dvitiyak/tritiyak) → apghatak (decomposers) — bacteria, kavak.
• 10% niyam (Lindeman): har poshan star par sirf ~10% urja agle star tak jaati hai; urja ka pravaah ek-dishaatmak.
• Urja ka pyramid hamesha seedha; samudra mein biomass ka pyramid ulta; ek ped par nirbhar keeton mein sankhya ka pyramid ulta.
• Jaiv-aavardhan (Biomagnification): DDT jaise vish ki maatra khaadya shrinkhla mein upar badhti hai (machhli khaane wale pakshi — ande ka chhilka patla).
• Eutrophication: urvarak/sewage se jheel mein poshak → shaival vriddhi → O₂ kami. BOD zyada = jaivik pradooshan zyada.
• Ozone kshay — CFC; Montreal Protocol (1987). Greenhouse gas — CO₂, CH₄, N₂O, CFC.

14.2 जैव-विविधता (Biodiversity)

• "Biodiversity" shabd lokpriya kiya — Edward Wilson.
• Jaati-kshetra sambandh (species-area relationship) — Alexander von Humboldt: kshetrafal badhne par jaatiyon ki sankhya ek seema tak badhti hai (log S = log C + Z log A).
• Bharat — 17 mahavividh (megadiverse) deshon mein; vishv ke ~2.4% bhoo-bhaag par ~7–8% jaatiyaan. Bharat ke 4 hotspot: Himalaya, Pashchimi Ghat–Sri Lanka, Indo-Burma, Sundaland (Nicobar). "Hotspot" avdharna — Norman Myers.
• Keystone jaati — paaritantra par apne sankhya se kahin zyada prabhaav. Flagship jaati — aakarshak prateek jaati jo sanrakshan ke prati jaagrukta/dhan jutaane ke liye chuni jaati hai (jaise baagh, giant panda).
• Sanrakshan: svasthaane (in-situ) — rashtriya udyaan, abhayaaranya, jaivmandal aarakshit kshetra (biosphere reserve); baahya-sthaane (ex-situ) — chidiyaghar, vanaspati udyaan, beej bank. IUCN Red List — sankatgrast jaatiyaan.
• MP sandarbh: 2022 ki akhil Bharatiya baagh ganana mein MP mein 785 baagh (desh ke sabhi rajyon mein sabse zyada — "Tiger State"). (Sep 2026 tak yahi latest prakashit aankda hai; 2026 ganana ki report 2027 mein apekshit.) Kuno National Park — 17 Sep 2022 ko Namibia se cheete laaye gaye. MP ka rajya pashu barasingha, rajya pakshi dudhraj (Indian paradise flycatcher), rajya vriksh bargad.