Connecting And Missing Links Of Biological World


Link Between the groups
Actinomvcetes Bacteria and Furigi
Archaeopteryx Birds and Reptiles
Balanoglossus Chordates and nonchordates
Chimaera (rat or rabbit fish) Bony and Cartilaginous fishes
Club moss Bryophytes and Pteridophytes
Cycas Pteridophytes and Gymnosperms
Gnetum Gymnosperms and Angiosperms
Neopilina Annelida and Mollusca
Ornithorhynchus Reptiles and Mammals
Peripatus (Walking worm) Annelida and Arthropoda
Protopterus (Lungfish). Pisces and Amphibia
Rickettsia Virus and Bacteria
Virus Living and non-living

Common Abbreviations in Biology

ABA Abscisic add
ACTH Adrenocorticotrophic Hormone
ADH Antidiuretic Hormone
AIDS Acquired Immuno Deficiency Syndrome
ATP Adenosine triphosphate
ATPase Adenosine triphosphatase
BCG Bacille Calmette-Guerin
BMR Basal Metabolic Rate
BOD Biological Oxygen Demand'
2, 4-D 2, 4-Dichlor?phenoxy acetic acid
DDT Dichloro diphenyl trichloroethane
DLC Differential Leucocyte' Count
ECG Electrocardiogram
EDTA Ethylenediamine tetra acetic acid
ELISA Enzyme-Linked Immunosorbent Assay
FAD Flavin adenine dinucleotide
FADH Reduced Flavin adenine dinucleotide
FMN Flavin mononucleotide
GDP' Guanosine diphosphate
GLC Gas- Liquid Chromatography
Hfr High frequency recombination cell
HIV Human Immunodeficiency Virus
HMP Hexose Monophosphate Pathway
IAA Indole Acetic Acid
IMI Intramuscular Injection
LH Luteinizing Hormone
LSD Lysergic acid Diethylamide
NAA Naphthalene Acetic Acid
NADP Nicotinamide adenine dinucleotide phosphate
NOR Nucleolar organising region
OPV Oral Polio vaccine
P680 Reaction centre of Photosystem II
P700 Reaction centre of Photosystem I
PEP Phospho enol pyruvate
PFR Phytochrome far red
PR Phytochrome red
RBC Red blood corpuscles
RUBP Ribulose bishosphate
Rubisco Ribulose bisphosphate carboxylase oxygenase
TLC Thin Layer
Chromatography or Total Leucocyte Count
TMV Tobacco mosaic virus
UTP Uridine triphosphate
WBC White blood corpuscles


Angiosperm Eucalyptus (Australian species, 114m)
Animal Giraffe (Giraffa camelopardalis)
Gymnosperm Sequoia semperuirens (111.25 m)
Monocot Plant Date palm (Phoenix dactyliferal


Angiospermic flower Wolffia (1.1 mm)
Angiospermic plant Lemna (Duckweed)
Ape Gibbon
Bone in man Ear ossicle Stapes (2.6-3.4mm)
Bird Humming bird of Cuba, (helenae)
Cell of vertebrate Squamous epithelium
Endocrine gland Pituitary
Gymnosperm Zamia pygmea
Invertebrate Major Phyla Porifera
Number of animal Ascaris (2) chromosome
Number of plant Haplopappus gracilis
chromosome (2n = 4)
Pollen grain Orchid
Pteridophyta Azolla


Bone of man  Femur
Cell Neuron
Creeper (Plant) Elephant creeper (Eniada pursaethai)
Leaf Raphia uinifera (30-50 ft)


Alga Maerocystis macrocarpa (Brown alga, Kelp 60 m)
Amphibian Cryptobranehus
Antherozoid Cyeas circinalis
Archegonium Bryophyte (Moss)
Biome (richest in terms of Tropical rain forest plant species)
Bird sanctuary Bharatpur
Class (of plantae) Angiosperms
Coral reef in world Great barrier reef of North East Coast of Australia (2 × 103 kms.)
Exocrine gland Liver
Flower Rafflesia arnoldi
Largest Forest area in India Madhya Pradesh
Number of Animal Aulocantha
chromosomes (Radiolarian; 2n = 1600)
Number of Plant Ophioglossum
chromosomes (pteridophyte, Adler'stongue, 2n=1262)
Plant cell Acetabularia (green alga).
Pollen grain in Angiosperms Mirabilis
Primate Gorilla'
Phylum (of Animals) Arthropoda

Important Dates

Antileprosy day 30th January
Blood Donation day 1st October
Doctor's day 1st July
Human Rights day 10th December
International day of  Biodiversity 29th December
International Thalassaemia day & World 8th May
Red. Cross day
Kisan Divas 23rd December
National Pollution Prevention day 2rtd December
Van Mahotsava (Festival of tree Plantation) 1st week of February and  July
Vigyan Divas 28 February'
World AIDS day 1st December
World Conservation day 3rd December
World Earth day' 22nd April
World Environment day 5th June
World' Forest day 21st March
World Health day 7th April
World Literacy day 8th September
World Ozone day 16th September
World Population day 11th July
World Wild Life Week 1st Monday of October.

NEET & AIIMS Exam Sample Papers

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Solved Sample Paper 1 Solved Sample Paper 2 Solved Sample Paper 3
Solved Sample Paper 4 Solved Sample Paper 5 Solved Sample Paper 6
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