Biology Handwritten Notes ™


Kanal geosi va tili: Hindiston, Hindcha


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A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is: [NEET 2023, NCERT concept based, Numerical type]
So‘rovnoma
  •   A) along northward
  •   B) along north-east
  •   C) along south-west
  •   D) along eastward
69 ta ovoz


Which one of the following organisms bears hollow and pneumatic long bones? [NEET-2021, Direct from NCERT lines, Fill in the blanks]
So‘rovnoma
  •   A. Macropus
  •   B. Ornithorhynchus
  •   C. Neophron
  •   D. Hemidactylus
82 ta ovoz


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🛑Major Role of Nutrients

Various elements perform the following major role in the plants:

(1) Construction of the plant body: The elements particularly C, H and O construct the plant body by entering into the constitution of cell wall and protoplasm. They are, therefore, referred to as frame work elements. Besides, these (C, H and O) N, P and S also enter in the constitution of protoplasm. They are described as protoplasmic elements.

(2) Maintenance of osmotic pressure: Various minerals present in the cell sap in organic or inorganic form maintain the osmotic pressure of the cell.

(3) Maintenance of permeability of cytomembranes: The minerals, particularly Ca++, K+ and Na+ maintain the permeability of cytomembranes.

(4) Influence the pH of the cell sap: Different cations and anions influence on the pH of the cell sap.

(5) Catalysis of biochemical reaction: Several elements particularly Fe, Ca, Mg, Mn, Zn, Cu, Cl act as metallic catalyst in biochemical reactions.

(6) Toxic effects: Minerals like Cu, As, etc. impart toxic effect on the protoplasm under specific conditions.

(7) Balancing function: Some minerals or their salts act against the harmful effect of the other nutrients, thus balancing each other.

🔔Specific Role of Macronutrients
The role of different elements is described below:

(1) Carbon, hydrogen and oxygen: These three elements though cannot be categorized as mineral elements, are indispensible for plant growth. These are also called 'framework elements'.

(2) Nitrogen: Nitrogen is an essential constituent of proteins, nucleic acids, vitamins and many other organic molecules as chlorophyll. Nitrogen is also present in various hormones, coenzymes and ATP etc.

(i) Deficiency symptoms: The symptoms of nitrogen deficiency are as follows:

(a) Impaired growth
(b) Yellowing of leaves due to loss of chlorophyll, i.e., chlorosis.
(c) Development of anthocyanin pigmentation in veins, sometimes in petioles and stems.
(d) Delayed or complete suppression of flowering and fruiting.

(3) Phosphorus: Phosphorous is present abundantly in the growing and storage organs such as fruits and seeds. It promotes healthy root growth and fruit ripening by helping translocation of carbohydrates.

(i) Deficiency symptoms
(a) Leaves become dark green or purplish.
(b) Sometimes development of anthocyanin pigmentation occurs in veins which may become necrotic (Necrosis is defined as localised death of cells).
(c) Premature fall of leaves.

(4) Sulphur
Functions
: Sulphur is a constituent of amino-acids like cystine, cysteine and methionine; vitamins like biotin and thiamine, and coenzyme A.

Deficiency symptoms
a) Leaf tips and margins roll downwards and inwards e.g., tobacco, tea and tomato.
b) Premature leaf fall.
c) Delayed flowering and fruiting.

(5) Potassium
Functions
(a) It differs from all other macronutrients in not being a constituent of any metabolically important compound.
(b) It is the only monovalent cation essential for the plants.
(c) It acts as an activator of several enzymes including DNA polymerase.

Deficiency symptoms
(a) Mottled chlorosis followed by the development of necrotic areas at the tips and margins of the leaves.
(b) K+ deficiency inhibits proteins synthesis and photosynthesis. At the same time, it increases the rate of respiration.
(c) The internodes become shorter and root system is adversely affected.

(6) Calcium
Functions
(a) It is necessary for formation of middle lamella of plants where it occurs as calcium pectate.
(b) It is necessary for the growth of apical meristem and root hair formation.
(c) It acts as activator of several enzymes, e.g., ATPase, succinic dehydrogenase, adenylate kinase, etc.

Deficiency symptoms
(a) Ultimate death of meristems which are found in shoot, leaf and root tips.
(b) Chlorosis along the margins of young leaves, later on they become necrotic.
(c) Distortion in leaf shape.


Application of Electromagnetism in Physics (including the Faraday’s Law)

Faraday’s Law is a fundamental law of electromagnetism. This law has widespread applications in various fields including industries, electrical machines etc. some of the major ones are listed below:

🧿 Electrical Transformers
This is a static device which is used for increasing or decreasing thhe voltage or current. It has its applications in generating station, transmission and distribution system. The transformer works on Faraday's law.

🧿 Electrical Generators
The basic working principle of electrical generator is Faraday's law of mutual induction .Electric generator is used to convert mechanical energy into electrical energy.

🧿 Induction Cookers
The Induction cooker also works on principle of mutual induction. When current flows through the coil of copper wire placed below a cooking container, it produces a changing magnetic field. This alternating or changing magnetic field induces an emf and hence the current in the conductive container.

🧿 Electromagnetic Flow Meters
It is used to measure velocity of blood and certain fluids. When a magnetic field is applied to electrically insulating pipe in which conducting fluids are flowing then according to Faraday's law an electromotive force is induced in it. This induced emf is proportional to velocity of fluid flowing.

🧿 Musical Instruments
It is also used in musical instruments like electric guitar, electric violin etc.


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Q_A man is sitting on a rotating table with his arms stretched outwards. When he suddenly folds his arms inside, then

1. his angular velocity will decrease
2. his angular velocity remains constant
3. his moment of inertia decreases
4. angular momentum increases


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To those who can't make out this Year.

I know it's really tough to go through the drastic scenario whichever you're going through right now.
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Make sure you take everything seriously this time,to fuel up your ego of winning.
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Now feel what failure looks like.
Feel the pain being a Dropper,
Don't worry it's not a very big trauma but actually it's also.
Despite these all,
Ek Promise kar sakte hoo khudse Pls ?
Take it as of Last Chance and Saare taano ka gussa ya kehlo reply we would have to give now,
Thik hai ?? nahi bhi hai toh bithalo apne andar ki Mai ab Nahi harunga aur nahi sun Sakta,
Meko yeh karna hii padega.
NEET is game of Time Management & Elimination,
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Congrats and Enjoy , at the same time don't pinch up the one who wasn't able to crack it due to any reason.

And Joh tum nahi kar paye woh bhi suno,
Koi nahi Self-analysis Karo aur Phod do.


P - Block | The Boron Family


Important Increasing Order 🌱

✔️ BOND ANGLE :-
(i) CH4 , C2H4 , C2H2
(ii) H2O, NH3 , CH4 , CO2
(iii) H2O, NH3 , CH4 , BH3
(iv) NO2—, NO2 , NO2+
(v) H2Se, H2S, H2O
(vi) AsH3 , PH3 , NH3
(vii) PF3 , PCl3 , PBr3 , PI3
(viii) NF3 , NCl3
(ix) NF3 , NH3 , NCl3
(x) OF2 , OH2 , Cl2O

✔️ MELTING POINT :-
(i) Cs, Rb, K, Na, Li
(ii) Mg, Ba, Sr, Ca, Be
(iii) CaI2 , CaBr2 , CaCl2 , CaF2
(iv) BeCl2 , MgCl2 , CaCl2 , SrCl2 , BaCl2
(v) NaI, NaBr, NaCl, NaF
(vi) CsCl, RbCl, KCl, NaCl
(vii) AlCl3 , MgCl2 , NaCl

✔️ BOILING POINT :-
(i) PH3 , AsH3 , NH3 , SbH3
(ii) H2S, H2Se, H2O
(iii) HCl, HBr, HI, HF
(iv) NH3 , HF, H2O
(v) He, Ne, Ar, Kr
(vi) H2O, D2O
(vii) H2 , Cl2 , Br2

✔️ DIPOLE MOMENTS :-
(i) CCl4 , CHCl3 , CH2Cl2 ,CH3Cl
(ii) NF3 , NH3 , H2O, HF
(iii) Cis-chloropropene, Trans-chloropropene
(iv) p, m, o-dichlorobenzene
(v) CH3I, CH3Br, CH3F, CH3Cl
(vi) NH3 , SO2 , H2O, HF
(vii) H2S, H2O
(viii) HI, HBr, HCl, HF
(ix) PH3 , ASH3 , SbH3 , NH3
(x) H2O, H2O2



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