Dr. Anand Mani Updates and news

#BREAKINGNEWS #NEET2023

NEET 2023 exam centre are out.

DIRECT LINK- https://examinationservices.nic.in/neet2023/DownloadAdmitCard/frmAuthforCity.aspx?enc=Ei4cajBkK1gZSfgr53ImFcFR+natXIEjJ1rCf6DMgOrFA4SfAMU1biZWfro5QnPt

🔰 High Weightage chapters for NEET

⦿ CHEMISTRY

1. s/p/d/f Blocks : 6 - 8 Q.
2. Chemical Bonding : 4 - 5 Q.
3. Oxygen cont. Group : 3 - 4 Q.
4. Hydrocarbon & Halogen derivatives : 3 - 4 Q.
5. Complex Compound: 3 - 4 Q.
6. Electrochemistry: 2 - 3 Q.
7. Reaction Mechanism: 2 - 3 Q.
8. Equilibrium,Acid base: 3 - 4 Q.
9. Thermodynamics : 1 - 2 Q.
10. Chemical Kinetics : 1 - 3 Q.
11. Atomic Structure : 1 - 2 Q.
12. Solution : 2 - 3 Q.
13. Biomolecules : 1 - 2 Q.
14. Mole concept : 1 - 2 Q.
15. Solid State: 1 - 2 Q.
16. Nitrogen compound: 1 - 2 Q.
17. Polymer: 1 - 2 Q.
18. Surface Chemistry: 1 - 2 Q.
19. States of matter: 1 - 2 Q.

🔰 PHOBIAS 🔰

◆Ablutophobia – fear of bathing, washing, or cleaning
◆Acousticophobia – fear of noise – a branch of phonophobia
◆Acrophobia – fear of heights
◆Agoraphobia – fear of helplessness and of leaving safe places
◆Agraphobia – fear of sexual abuse
◆Ablutophobia - Fear of washing or bathing.
◆Achluophobia - Fear of darkness.
◆Acousticophobia - Fear of noise.
◆Ailurophobia – fear/dislike of cats.
◆Alektorophobia - Fear of chickens.
◆Androphobia - Fear of men.
◆Anthrophobia - Fear of flowers.
◆Arithmophobia - Fear of numbers.
◆Atychiphobia - fear of failure
◆Aurophobia - Fear of gold.
◆Barophobia – fear of gravity
◆Bathmophobia – fear of stairs or slopes
◆Botanophobia – fear of plants
◆Catoptrophobia - Fear of mirrors.
◆Chrematophobia - Fear of money.
◆Chromatophobia - Fear of colors.
◆Cynophobia - Fear of dogs or rabies.
◆Dendrophobia - Fear of trees.
◆Dikephobia - Fear of justice.
◆Eleutherophobia - Fear of freedom.
◆Entomophobia – fear/dislike of insects.
◆Gamophobia – fear of marriage, commitment
◆Gelotophobia – fear of being laughed at
◆Gerascophobia – fear of growing old or aging
◆Gerontophobia – fear of growing old, or a hatred or fear of the elderly
◆Globophobia - fear of balloons
◆Glossophobia – fear of speaking in public or of trying to speak
◆Gymnophobia – fear of nudity
◆Gynophobia – fear of women
◆Glossophobia – fear of speaking in public or of trying to speak
◆Gynophobia – fear of women.
◆Heliophobia – fear of sunlight/sun
◆Hemophobia - Fear of blood.
◆Herpetophobia - fear/dislike of reptiles.
◆Hippophobia - Fear of horses..
◆Ichthyophobia – fear/dislike of fish.
◆Kinetophobia, kinesophobia – fear of movement
◆Kleptophobia, cleptophobia – fear of stealing or being stolen
◆Mechanophobia – fear of machines
◆Melanophobia – fear of the color black
◆Melissophobia – fear of bees
◆Meteorophobia – fear of meteors
◆Methyphobia – fear of alcohol
◆Mnemophobia – fear of memories
◆Myrmecophobia – fear of ants
◆Necrophobia – fear of death and/or the dead
◆Nosocomephobia – fear of hospitals
◆Nosophobia – fear of contracting a disease
◆Nosocomephobia - fear of hospitals.
◆Osmophobia, Olfactophobia – fear of smells.
◆Phobophobia – fear of having a phobia.
◆Potophobia/Methyphobia - Fear of alcohol
◆Pyrophobia - Fear of fire
◆Selenophobia - Fear of the moon.
◆Sophophobia - Fear of learning.
◆Tachophobia - Fear of speed.
◆Thaasophobia/ Kathisophobia - Fear of sitting.
◆Thalassophobia - Fear of the sea.
◆Thermophobia - Fear of heat.
◆Xanthophobia – fear of the color yellow
◆Xenophobia – fear of strangers, foreigners, or aliens



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🩺 𝐎𝐮𝐫 𝐀𝐢𝐦 𝐢𝐬 𝐭𝐨 𝐒𝐚𝐯𝐞 𝐘𝐨𝐮𝐫 𝐓𝐢𝐦𝐞

𝐅𝐨𝐫𝐰𝐚𝐫𝐝 𝐭𝐡𝐢𝐬 𝐩𝐨𝐬𝐭 𝐭𝐨 𝐚𝐥𝐋 𝐲𝐨𝐮𝐫 𝐟𝐫𝐢𝐞𝐧𝐝𝐬.

Human Reproduction Important Questions for CBSE Class 12 Biology Fertilisation, Pregnancy and Embryonic Development

Previous Year Examination Questions

1 Mark Questions

1.How is the entry of only one sperm ensured into an ovum during fertilisation in humans?[All India]
Ans.During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes (depolarisation) in the membrane that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum

2.Mention the function of trophoblast in human embryo.[Delhi 2011]
Ans.Trophoblast is the outer layer of blastocyst which helps in attachment of blastocyst to the endometrium of the uterus.

3.Name the embryonic stage that gets implanted in the uterine wall of a human female. [All India]
Ans.Blastocyst gets implanted in the uterine wall.

4.What stimulates pituitary to release the hormone responsible for parturition? Name the hormone.[All India ]
Ans.Foetal ejection reflex stimulates pituitary to release the oxytocin hormone, which is responsible for parturition.

5.How does colostrum provide initial protection against diseases to newborn infants? Give one reason. [Delhi 2009]
Ans.Colostrum contains necessary antibodies (IgA) that provide protection against diseases to newborn infants.

2 Marks Questions
6.Where does fertilisation occur in humans? Explain the events that occur during this process. [All India]
Ans.In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube.
The events that occur during the process of fertilisation are:
(i) The sperm reaches the junction of ampulla and isthmus and comes in contact with zona pellucida layer of ovum.
(ii) Acrosome of sperm head release sperm lysin enzymes that dissolves corona radiata and digests zona pellucida layer and enters cytoplasm.
(iii) Entry of sperm stimulates secondary oocyte to complete its suspended second meiotic division, thus producing haploid egg or ovum and second polar body.
(iv)Nucleus of sperm and of ovum fuses to form a diploid zygote.

7.Explain the events that occur during fertilisation of an ovum in humans. How is it that only one sperm enters the OVUm? [All India]
Ans.(i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube.
The events that occur during the process of fertilisation are:
(a) The sperm reaches the junction of ampulla and isthmus and comes in contact with zona pellucida layer of ovum.
(b) Acrosome of sperm head release sperm lysin enzymes that dissolves corona radiata and digests zona pellucida layer and enters cytoplasm.
(c) Entry of sperm stimulates secondary oocyte to complete its suspended second meiotic division, thus producing haploid egg or ovum and second polar body.
(d)Nucleus of sperm and of ovum fuses to form a diploid zygote.
(ii)During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes (depolarisation) in the membrane that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum

8.(i) Where do the signals for parturition originate in humans?
(ii) Why is it important to feed the newborn babies on colostrum? [All India 2012]
Ans.(i)The signals for parturition originate from the fully developed foetus and the placenta, which induce mild uterine contraction called foetal ejection reflex
(ii)Colostrum contains necessary antibodies (IgA) that provide protection against diseases to newborn infants.

9.Name the hormones produced only during pregnancy in human female. Mention their source organ.
Ans.The hormones produced only during pregnancy in human female are human Chorionic Gonadotropin (hCG), human Placental Lactogen (hPL) and relaxin. The source of hCG and hPL — Placenta, and Relaxin — Ovary.

10.Placenta acts as an endocrine tissue. Justify. [All India 2010]
Ans.Placenta acts as an endocrine tissue as it secretes hormones like
(i) hCG (human Chorionic Gonadotropin)
(ii) hPL

📚🖊️𝙼𝚎𝚗𝚍𝚎𝚕𝚒𝚊𝚗 𝙳𝚒𝚜𝚘𝚛𝚍𝚎𝚛☞￣ᴥ￣☞

♦️𝚃𝚑𝚎𝚜𝚎 𝚍𝚒𝚜𝚘𝚛𝚍𝚎𝚛𝚜 𝚘𝚌𝚌𝚞𝚛 𝚍𝚞𝚎 𝚝𝚘 𝚖𝚞𝚝𝚊𝚝𝚒𝚘𝚗𝚜 𝚒𝚗 𝚊 𝚜𝚒𝚗𝚐𝚕𝚎 𝚐𝚎𝚗𝚎 𝚊𝚗𝚍 𝚌𝚊𝚗 𝚋𝚎 𝚎𝚊𝚜𝚒𝚕𝚢 𝚍𝚎𝚝𝚎𝚌𝚝𝚎𝚍 𝚋𝚢 𝚙𝚎𝚍𝚒𝚐𝚛𝚎𝚎 𝚊𝚗𝚊𝚕𝚢𝚜𝚒𝚜.

♦️𝚃𝚑𝚎𝚜𝚎 𝚍𝚒𝚜𝚘𝚛𝚍𝚎𝚛𝚜 𝚌𝚊𝚗 𝚋𝚎 𝚊𝚞𝚝𝚘𝚜𝚘𝚖𝚊𝚕 𝚍𝚘𝚖𝚒𝚗𝚊𝚗𝚝, 𝚊𝚞𝚝𝚘𝚜𝚘𝚖𝚊𝚕 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎, 𝚜𝚎𝚡-𝚕𝚒𝚗𝚔𝚎𝚍 𝚍𝚘𝚖𝚒𝚗𝚊𝚗𝚝, 𝚜𝚎𝚡-𝚕𝚒𝚗𝚔𝚎𝚍 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎, 𝚊𝚗𝚍 𝚖𝚒𝚝𝚘𝚌𝚑𝚘𝚗𝚍𝚛𝚒𝚊𝚕.

🦋🔪𝚃𝚑𝚎 𝚖𝚘𝚜𝚝 𝚌𝚘𝚖𝚖𝚘𝚗 𝙼𝚎𝚗𝚍𝚎𝚕𝚒𝚊𝚗 𝚍𝚒𝚜𝚘𝚛𝚍𝚎𝚛𝚜 𝚒𝚗𝚌𝚕𝚞𝚍𝚎:

🔥𝙲𝚢𝚜𝚝𝚒𝚌 𝚏𝚒𝚋𝚛𝚘𝚜𝚒𝚜 (𝚊𝚞𝚝𝚘𝚜𝚘𝚖𝚊𝚕 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎),

🔥𝙷𝚊𝚎𝚖𝚘𝚙𝚑𝚒𝚕𝚒𝚊 (𝚜𝚎𝚡-𝚕𝚒𝚗𝚔𝚎𝚍 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎),

🔥𝙰𝚕𝚋𝚒𝚗𝚒𝚜𝚖 (𝚊𝚞𝚝𝚘𝚜𝚘𝚖𝚊𝚕 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎),

🔥𝚂𝚒𝚌𝚔𝚕𝚎 𝚌𝚎𝚕𝚕 𝚊𝚗𝚊𝚎𝚖𝚒𝚊 (𝚊𝚞𝚝𝚘𝚜𝚘𝚖𝚊𝚕 𝚛𝚎𝚌𝚎𝚜𝚜𝚒𝚟𝚎).
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✿ ✿

NEET UG 2022 All India Counselling 15% All India Qouta 1st Round Cutoff

👉        RANK.           MARKS

👉🏻GEN - 17401      Marks - 608
👉🏻OBC - 18034     Marks - 606
👉🏻EWS - 18989     Marks - 602
👉🏻SC - 89842        Marks - 492
👉🏻ST - 123071      Marks - 454

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NEET UG 2022 RAJASTHAN 1st Round Cutoff

👉        RANK.           MARKS

👉🏻GEN - 10539      Marks - 626
👉🏻OBC - 10683     Marks - 626
👉🏻EWS - 11499     Marks - 624
👉🏻SC - 70110        Marks - 519
👉🏻ST - 80335        Marks - 505

🌺𝐒𝐎𝐌𝐄 𝐈𝐌𝐏𝐎𝐑𝐓𝐀𝐍𝐓 𝐂𝐎𝐍𝐍𝐄𝐂𝐓𝐈𝐍𝐆 𝐋𝐈𝐍𝐊𝐒 𝐁𝐄𝐓𝐖𝐄𝐄𝐍 𝐆𝐑𝐎𝐔𝐏𝐒

1. Bacteria & Fungi
🌸 Actinomycetes

2. Reptiles & Birds
🌸 Archaeopteryx

3. Chordates & Non-chordates
🌸 Balanoglossus

4. Cartilaginous & Bony fishes
🌸 Chimera (Rabbit fish/Ratfish)

5. Bryophytes & Pteridophytes
🌸 Club moss

6. Coelenterates & Platyhelminthes
🌸 Ctenophora

7. Pteridophytes & Gymnosperms
🌸Cycas

8. Reptiles & Mammals
🌸 Echidna (Spiny ant eater)

9. Animals & Plants
🌸 Euglena

10. Gymnosperms & Angiosperms
🌸 Gnetum

11. Protista & Bryophytes
🌸Hornworts

12. Pisces & Amphibia
🌸 Latimeria

13. Protista & Fungi
🌸 Myxomycetes

14. Annelida & Mollusca
🌸Neopilina

15. Reptiles & Mammals
🌸 Ornithorhynchus (Duck billed platypus)

16. Annelida & Arthropoda
🌸Peripatus (walking worm)

17. Protozoa & Porifera
🌸 Proterospongia

18. Bony fishes & Amphibia
🌸 Protopterus (Lung fishes)

19. Virus & Bacteria
🌸 Rickettsia

20. Amphibia & Reptiles
🌸Seymouria

21. Amphibia & Reptilia
🌸 Sphenodon (Living fossil lizard)

22. Echinodermata & Chordata
🌸 Tornaria larva

23. Annelida & Mollusca
🌸 Trochophore larva

24. Living & non-living
🌸Virus

25. Protozoa & Metazoa
🌸Xenoturbella

★➢ Tissue – group of cells having a common origin and usually performing a common function

☆➢ Two groups of plant tissue
- meristematic
- permanent

★➢ meristems – Growth in plants is largely restricted to specialised regions of active cell division
☆- apical meristems – occur at the tips of roots and shoots and produce primary tissues
★➔ shoot apical – meristem occupies the distant most region of the stem axis
★➔ root apical – occupies the tip of a root
- intercalary meristem – occurs between mature tissues
☆➔ occur in grasses and regenerate parts removed by the grazing herbivores
☆- secondary or lateral meristem ☆– occurs in the mature regions of roots and shoots
☆➔ appear later than primary meristem
☆➔ cylindrical meristems
☆➔ responsible for producing the secondary tissues
☆➔ examples of later meristem ☆– Fascicular vascular cambium, interfascicular cambium
and cork-cambium

★➢ permanent or mature cells – newly formed cells become structurally and functionally
specialised and lose the ability to divide, constitute Primary tissue