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 |
Tallest
| Angiosperm | Eucalyptus (Australian species, 114m) |
| Animal | Giraffe (Giraffa camelopardalis) |
| Gymnosperm | Sequoia semperuirens (111.25 m) |
| Monocot Plant | Date palm (Phoenix dactyliferal |
Smallest/Shortes
| 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 | PPLO |
| 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 |
Longest
| Bone of man | Femur |
| Cell | Neuron |
| Creeper (Plant) | Elephant creeper (Eniada pursaethai) |
| Leaf | Raphia uinifera (30-50 ft) |
Largest/Biggest/Heaviest
| 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. |