List the seven characteristics of living things

1.1.2 · Biology › What Is Biology & Characteristics of Life

Overview

Living organisms ko saat universal characteristics se define kiya jata hai jo unhe non-living matter se alag karti hain. Yeh traits ek integrated system ki tarah milke kaam karti hain—koi bhi ek akeli characteristic life ko define nahi karti, lekin saaton ka hona zaroori hai. Mnemonic MRS GREN (ya kuch versions mein MRS C GREN) in fundamental properties ko yaad rakhne mein madad karta hai.

The Seven Characteristics

Har characteristic necessary hai, lekin akele sufficient nahi. Ek crystal grow karta hai par reproduce nahi karta; ek virus reproduce karta hai par independently respire nahi karta.

1. Movement

Types of movement:

External movement: locomotion (animals ka daudna, bacteria flagella)
Internal movement: cytoplasmic streaming, organelle transport, blood circulation
Growth movements: plant stems ka light ki taraf jhukna (phototropism)

2. Respiration

Core equation (aerobic respiration):

C_{6} H_{12} O_{6} + 6 O_{2} \to 6 CO_{2} + 6 H_{2} O + energy (ATP)

Key principle: Energy "create" nahi hoti, balki glucose ke chemical bonds se ATP ke high-energy phosphate bonds mein transfer hoti hai.

3. Sensitivity (Responsiveness)

Stimulus-Response Model:

Stimulus Receptor Nervous system Effector Response

4. Growth

Measurement:

Linear growth: height/length mein increase
Mass growth: dry mass mein increase (paani hatane ke baad)
Cell number: mitotic divisions

Exponential kyun? Har cell divide hokar do banata hai, jo divide hokar chaar banate hain, aur aise—multiplicative process hai.

5. Reproduction

Do modes:

Asexual: Single parent → genetically identical offspring (clones)
Sexual: Do parents genetic material contribute karte hain → genetically unique offspring

6. Excretion

Key waste products:

CO₂: respiration se → lungs/gills/stomata ke through excrete hota hai
Ammonia/Urea: protein breakdown se → kidneys ke through excrete hota hai
Water: osmotic balance maintain karne ke liye excess hataya jaata hai

Convert kyun? Ammonia bahut toxic hai lekin water-soluble hai (aquatic animals). Urea kam toxic hai, zyaada concentrated (mammals). Uric acid almost insoluble hai, paani bachata hai (birds, reptiles).

7. Nutrition

Do nutritional modes:

Autotrophic (self-feeding): Inorganic sources se organic molecules synthesize karna
- Photosynthesis: light energy → glucose
- Chemosynthesis: chemical energy (e.g., H₂S) → glucose
Heterotrophic (other-feeding): Doosre organisms dwara banaye organic molecules consume karna
- Herbivores, carnivores, decomposers

Conservation se derivation:

Input: 6 carbon (CO₂), 12 oxygen (CO₂), 12 hydrogen (H₂O), 6 oxygen (H₂O)
Output: glucose mein 6 carbon + 12 hydrogen + 6 oxygen, 12 oxygen as O₂
Dono sides par mass/atoms balance hai ✓

Integration: How Characteristics Work Together

Nutrition → fuel provide karta hai → Respiration → energy release karta hai → 
Movement, Sensitivity, Growth, Reproduction power karta hai → 
jo waste generate karte hain → Excretion waste remove karta hai → 
cycle jaari rehta hai

Kisi bhi ek characteristic ko hatao, aur poora system collapse ho jaata hai. Yahi interdependence kisi cheez ko "alive" banata hai.

Common Mistakes

Memory Aids

Alternative: MRS C GREN (kuch curricula mein Control/Homeostasis bhi add hota hai)

Recall Feynman Explanation (Ek 12-saal ke bacche ko samjhao)

Soch lo tumhare paas ek robot hai. Tum kaise jaanoge ki woh sach mein "alive" hai ya sirf ek machine?

Scientists ne animals, plants, aur bacteria ke baare mein bhi yahi sawaal poocha. Unhone paaya ki saari living things yeh saat kaam karti hain:

Movement: Woh move kar sakti hain—shayad walk nahi, lekin kam se kam andar ki cheezein move karti hain, jaise tumhara blood move karta hai.
Respiration: Woh energy ke liye khaana "jalaati" hain, jaise car gas jalati hai. Plants bhi yeh karti hain!
Sensitivity: Woh cheezein notice karti hain—jaise jab tum ek plant ko chhoote ho aur woh react karta hai, ya tum garam/thanda feel karte ho.
Growth: Woh zyaada cells banakar badi hoti hain, sirf haawa se phulke nahi.
Reproduction: Woh bachche banati hain (ya beej, ya do mein split ho jaati hain).
Excretion: Woh waste nikaalti hain—jaise tum peshab karte ho, plants gases release karti hain.
Nutrition: Woh khaana khaati hain (plants sunlight se khaana banati hain; tum burgers khaate ho).

Ek pathar yeh mein se EK bhi nahi karta. Ek kutta SAATON karta hai. Ek virus kuch karta hai lekin sab nahi—isliye scientists debate karte hain ki viruses "alive" hain ya nahi! MRS GREN yaad rakhho aur tum yeh saat kabhi nahi bhoologe.

Connections

1.1.01-Define-biology-as-the-study-of-living-organisms — Yeh saat characteristics define karti hain ki biology kya study karti hai
1.2.01-Cell-theory-all-living-things-are-made-of-cells — Cells saaton characteristics exhibit karti hain
2.1-Biological-molecules — Nutrients (characteristic 7) in molecules se bane hote hain
3.1-Enzymes — Reactions catalyze karke respiration (characteristic 2) enable karte hain
4.1-Cell-membrane-and-transport — Excretion (characteristic 6) ke liye membrane transport chahiye
5.1-Photosynthesis — Plants mein autotrophic nutrition (characteristic 7)
6.1-Cellular-respiration — Characteristic 2 ka detailed mechanism
8.1-Mitosis — Growth (characteristic 4) aur asexual reproduction (characteristic 5) enable karta hai
9.1-Meiosis-and-sexual-reproduction — Sexual reproduction (characteristic 5)
11.1-Nervous-system — Animals mein sensitivity (characteristic 3) coordinate karta hai
12.1-Homeostasis — Saari saat characteristics ko stability maintain karne ke liye integrate karta hai

#flashcards/biology

Living things ki saat characteristics kya hain? :: Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition (MRS GREN)

Respiration aur breathing mein kya fark hai?

Respiration cells mein nutrients se energy ka biochemical release hai (chemical process). Breathing lungs/gills mein gas exchange hai (physical process). Breathing oxygen SUPPLY karti hai respiration KE LIYE.

Excretion ko define karo aur batao yeh egestion se kaise alag hai.

Excretion body DWARA banaye gaye toxic metabolic waste products hatana hai (e.g., CO₂, urea). Egestion undigested food hatana hai jo kabhi body cells mein gaya hi nahi (e.g., feces).

Autotrophic aur heterotrophic nutrition mein kya fark hai?

Autotrophic organisms inorganic sources se apne khud ke organic molecules banate hain (e.g., plants photosynthesis se). Heterotrophic organisms doosron dwara banaye organic molecules consume karte hain (e.g., animals plants/meat khaate hain).

Kisi cheez ko alive maane jaane ke liye saaton characteristics ka hona kyun zaroori hai?

Har characteristic necessary hai lekin akele sufficient nahi. Crystals grow karte hain lekin reproduce nahi karte. Viruses reproduce karte hain lekin independently respire nahi karte. Sirf SAATON ki presence ek living organism define karti hai.

Plants mein movement ka ek example do.

Phototropism (stems ka light ki taraf jhukna), nyctinasty (flowers ka khulna/band hona), stomatal guard cells ka shape change karna, ya Mimosa pudica ki leaves ka chhoone par band hona.

Aerobic respiration ki core equation kya hai?

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy (ATP). Glucose aur oxygen react karke carbon dioxide, paani, aur usable energy produce karte hain.

Living organisms mein sensitivity kya hai?

Stimuli (environmental changes) detect karke receptors aur effectors ke through appropriate responses produce karne ki ability.

Reproduction individual survival ke liye zaroori nahi hai, phir bhi yeh important kyun hai?

Individual organisms mar jaate hain. Reproduction species continuity ensure karta hai aur variation ke through evolution enable karta hai. Yeh woh tarika hai jisse biological information (DNA) time ke across persist karti hai.

Growth aur development mein kya fark hai?

Growth size/mass mein permanent increase hai (zyaada cells ya badi cells). Development differentiation aur specialization ke through complexity badna hai. Yeh aksar saath hote hain lekin alag processes hain.

Organisms ko waste excrete kyun karna padta hai?

Metabolic processes toxic byproducts (ammonia, CO₂) produce karti hain jo accumulate hone par homeostasis disrupt karti hain. Excretion inhe hatata hai internal balance maintain karne aur poisoning rokne ke liye.

Reproduction ke do types kya hain?

Asexual (single parent, genetically identical offspring) aur sexual (do parents, genetic recombination se genetically unique offspring).

Alag-alag animals alag forms mein nitrogenous waste kyun excrete karte hain?

Ammonia (fish): bahut toxic lekin water-soluble, paani mein dilute hoti hai. Urea (mammals): kam toxic hai, concentrate ho sakti hai, kuch paani chahiye. Uric acid (birds/reptiles): almost insoluble hai, maximum paani bachata hai.