NCERT PCMB OFFICIAL ™✅

2021-08-22 20:33:17 #mindmap Open / Comment

2021-08-22 20:16:35 #IMPORTANT QUESTION FOR #NEET 2021

1) Red color of carrot and tomato is due to:
anthocyanin
2) P.H of human blood is
7.0
3) Largest organ inside human body is:
Liver
4) Largest organ of human body is:
skin
5) What is celluloses:
Carbohydrates
6) The smallest of all human cells are:
RBCs
7) No of bones in human body is:
206
8) Smallest unit of life is:
Cell
9) Red blood cells have no:
Nucleus
10) White blood cells are also known as:
Leucocytes
11) Red blood cells are also known as:
Erythrocytes
12) Life appeared on earth about:
3 billion years ago
13) When earth was formed its atomsphere were composed of:
Water vapour, ammonia and Methane
14) Biochemical organ of life is discovered by:
Oparin
15) Group of cells are termed as:
Tissue
16) Kingdom fungi are known as:
Decomposer
17) Which cell organelles not participate in cell division:
Ribosomes
18) Longest bone in human body is:
Femur
19) Shortest bone in human body is:
Stapes
20) Most important food is derived from:
Fruits
21) After human most intelligent mammal is:
Dolphins
22) Prokaryot doesn't possess:
Nucleus
23) Eukaryot has a:
Nucleus
24) In bacterial cell..............is not found:
Golgi apparatus
25) ................Is found in plant cell while in animal cell it is absent.
Cell wall Open / Comment

2021-08-22 17:10:17 #imp #ANIMAL KINGDOM #NCERT

°•°•°•PHYLUM-PORIFERA•°•°•°

Sponges have water canal transport or canal system.
Sycon(Scypha),Spongilla(Fresh water sponge),Euspongia(Bath sponge)

•°•°•°•°PHYLUM- COELENTRATA (CNIDARIA)•°•°•°•°•

Polyp produce medusa asexually and Medusa produce polyp sexually.(Metagenesis - Obelia)
Polyp - Hydra, Adamsia
Medusa - Aurelia or Jelly fish
EX:-Physalia(Portuguese man of-war),Adamsia(Sea anemone),Pennatula(Sea pen),Gorgonia(Sea fan) and Meandrina(Brain coral)

°•°•°•PHYLUM-CTENOPHORA•°•°

Bioluminescence is well marked.
Ex:-Pleurobrachia,Ctenoplana

°•PHYLUM-ASCHELMINTHES•°
Pseudocoelomates animals
Ex:-Ascaris(Round Worm),Wuchereria(Filaria Worm),Ancylostoma(Hookworm)

°•°•PHYLUM-ANNELIDA•°•°•
Nephridia help in osmoregulation and excretion.
Nereis,Pheretima(Earthworm) and Hirudinaria(Blood sucking leech)

°•°•PHYLUM-ARTHOPODA•°•°

Have Jointed appendages
EX:-Economically imp. insects:-Apis(Honeybee),Bombyx(Silkworm),Laccifer(Lac insect)
Vectors:-Anopheles, Culex and Aedes (Mosquitoes)
Gregarious pest :- Locusta (Locust)
Living Fossil:- Limulus(King Crab

°•°•PHYLUM-MOLLUSCA•°•°

Mouth contain a file like rasping organ for feeding called Radula.
Ex:-Pila(Apple snail),Pinctada(Pearl oyster),Sepia(Cuttlefish),Loligo(Squid),Octopus(Devil fish),Aplysia(Sea hare),Dentalium(Tusk shell) and Chaetopleura(Chiton)

°•PHYLUM-ECHINODERMATA•°
Presence of Water Vascular System.
Ex:-Asterias(Star fish),Echinus(Sea urchin),Antedon(Sea lily),Cucumaria(Sea cucumber) and Ophiura(Brittle star)

°•PHYLUM-HEMICHORDATA•°
Excretory organ - Proboscis gland
Ex:-Balanoglossus and Saccoglossus

•°•°•PHYLUM-CHORDATA•°•°•

Charcterised by presence of Notochord,Dorsal hollow nerve cord,Paired pharyngeal gill slits.

Urochordata:- Ascidia, Salpa, Doliolum
Cephalochordata:- Branchiostoma(Amphioxus or Lancelet)

Sub-Phylum-VERTEBRATA
Class-Cyclostomata
Ex:-Pteromyzon(Lampery) and Myxine(Hagfish)
Pteromyzon:- Ammocete larva

•°•°•CLASS-REPTILIA•°•°•

Ex:-Chelone(Turtle),Testudo(Tortoise),Chameleon(Tree lizard),Calotes(Garden lizard),Crocodilus(Crocodile),Alligator,Hemidactylus(Wall lizard)

Poisonous snakes :-Naja(Cobra), Bangarus(Krait),Vipera(Viper

•°•°•CLASS-AVES•°•°•

Ex:-Corvus(Crow),Columba(Pigeon),Psittacula(Parrot),Struthio(Ostrich),Pavo(Peacock),Aptenodytes(Penguin),Neophron(Vulture)

•°•°•CLASS-MAMMALIA•°•°•

Oviparous :-Ornithorhynchuss (Platypus)
Viviparous :- Macropus(Kangroo), Pteropus (FlyingFox), Camelus(Camel), Macaca(Monkey), Rattus(Rat), Canis(Dog),Felis(Cat), Elephus(Elephant), Equus(Horse), Delphinus(Common dolphin), Balaenoptera(Blue whale), Panthera tigris(Tiger), Panthera leo(Lion

»-----------------☆---------------------► Open / Comment

2021-08-22 17:05:30 #Important Points of #NCERT #NEET_2021

1. The world's first National Park (America) – Yellow stone National Park

2. India's first National Park – Jim Corbett National Park – Nainital (Uttaranchal)

3. Smallest tiger reserve in India – Ranthambore National Park - Sawaimadhopur (Rajasthan).

4. Largest Tiger reserve in India – Nagarjuna Sagar Saisailum Sanctuary - Guntoor - Andhra Pradesh.

5. Nandan-Kanan zoo (Bhubaneshwar - Orissa) is known for - White tiger.

Some Important Info.

(i) National Forest Policy revised in – 1988.

(ii) Biodiversity act of India was passed by the Parliament in the year-2002

(iii) Forest Act–1927.

(iv) Biosphere Reserve Scheme– 1986

2. Wild life protection act 1972 (Revised in 1991) : Open / Comment

2021-08-21 18:21:12 #imp NAMING OF COMPOUNDS EXCLUSIVE SHEETS Open / Comment

2021-08-21 18:20:49 #BIOLOGY MOST #IMPORTANT #TRICKS
#share this channel link with ur frnds Open / Comment

2021-08-21 15:37:34 #mostImp POINTS #REPRODUCTIVE HEALTH
1. Which country in world to initiate family planning programme in 1951 INDIA
2. Improved programmes covering wider reproduction-related areas 'Reproductive and child Health care
are currently in operation under the popular name. (RCH) programmes.
3. Amniocentesis is statutory banned for Sex determination
4. Central Drug Research Institute (CDRI). Scientists developed a new
oral contraceptive for the females is. SAHELI
5. Periodic abstinence is which type of centraceptive method - Natural method
6. In periodic abstinence couple avoid coitus from 10 to 17 day of m.c.
7. In m.c. day 10 to 17 is known as Fertile period
8. Lactational amenorrhea is effective only upto maximum period of. 6 month
9. 'Nirodh' is a popular brand of Condom for male
10. Which contraceptive method also prevent from STD and AIDS. -Condom
11. Match the columns. a-v, b-iv, c-i, d-ii, e-iii, f-vi
a Non-meclicated IUDs i Uterus unsuitable for implantation
b Copper-releasing IUDs ii Inhibit ovulation
c Hormone-releasing IUDs iii Cutting of fallopian tube
d Progesterone-pill iv Suppress motility of sperms
e Tubectomy v Increase phagocytosis of sperms
f Vasectomy vi Cutting of vas-deferens
12. Ideal contraceptives for the females who wants to delay pregnancy. IUDs
13. Oral pills for females causes Inhibit ovulation and implantation
14. Once a-week oral pill is Saheli
15. In emergency which contraceptive methods may be used within IUD & progestogen or progestogen
72 hours of coitus. estrogen combination pills.
16. Which contraceptive method are also known as sterilisation. Surgical method
17. Sterilisation in male is known as. Vasectomy
18. Government of INDIA legalised MTP in. 1971
19. MTP is considered relatively safe during. First trimester
20. In ZIFT-early embryo is transfered in (upto 8 blastomeres) Fallopian tube
21. Full form of ZIFT Zygote Intra Fallopian Transfer
22. In IUT, embryos with more than 8 blastomeres are transffered in Uterus
23. Full form of GIFT Gamete Intra Fallopian Transfer
24. Procedure in which to form an embryo in the laboratory in which a ICSI-Intracytoplasmic sperm injection
sperm is directly injected into the cytoplasm of ovum
25. If male is unable to inseminate the semen into vegina then which Artificial insemination (AI) or
procedure is used. IUI-Intrauterine insemination.

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https://t.me/joinchat/sIGogSuapu82NWVl. Open / Comment

2021-08-21 10:37:45 #imp PARAGRAPH #Huygens’ Wave Theory of Light #NCERT

This is one of the most important principles of wave analysis which was introduced by an eminent physicist Huygens. The crux of the principle is that every point of a wave front can be treated as the source of secondary wavelets that spread out in all directions with the same speed as that of the speed of propagation of waves. This just implies that an edge of a wave can actually be viewed as creating a series of circular waves. Usually, these waves combine to carry on the propagation, but sometimes there are noteworthy evident results. The wave front which is defined as the surface, on which the wave disturbance is in phase, actually appears to be tangent to all the circular waves.

Though these results can be easily derived from Maxwell’s equations as well, but Huygens’ Principle is better suited for performing calculations on waves. Maxwell was the one who provided solid theoretical basis to what Huygens’ had already anticipated around two centuries back.

According to this principle, a plane light wave passes through free space at the speed of light. The below figure demonstrates the motion of light rays associated with the propagation of wave front. Open / Comment

2021-08-21 10:18:58 City of examination for NEET 2021 have been allotted, check yours on official site

https://neet.nta.nic.in/ Open / Comment

2021-08-21 10:18:20 #BREAKINGNEWS #NEET2021

Nta has released how the paper will come and how to fill omr.
A sample omr is also shared by nta in above file.
Do download the pdf and see how omr comes.

STAY CONNECTED with @NCERT_PCMB_OFFICIAL Open / Comment