TALLEST

• Angiosperm - Eucalyptus (Australian  species, 114m)
• Animal - Giraffe (Giraffa  camelopardalis)
• Gymnosperm - Sequoia sempervirens (111.25 m)
• Monocot plant - Date palm  (Phoenix dactylifera)

SMALLEST/SHORTEST

• Angiospermic flower - Wolffia (1.1mm)
• Angiospermic plant - Lemna (Duckweed)
• Ape - Gibbon
• Bird - Hummingbird of Cuba (Helenae)
• Cell - Pleuro Pneumonia like Organisms (PPLO)
• Cell of vertebrate - Squamous epithelium
• Gymnosperm - Zamia pygmaea
• Number of chromosome in animals - Ascaris (2)
• Number of chromosome in plant - Haplopappus gracilis (2n = 4)
• Pollen grain - Orchid
• Pteridophyta - Azolla

LONGEST

• Bone of man - Femur
• Cell - Neuron
• Creeper (Plant) - Elephant creeper (Entada pursaetha)
• Leaf - Raphia vinifera (30-50 ft)

LARGEST/BIGGEST/HEAVIEST

• Alga - Macrocystis macrocarpa (Brown alga, Kelp 60 m)
• Amphibian - Cryptobranchus
• Antherozoid - Cycas circinalis
• Archegonium - Bryophyte (Moss)
• Biome (richest in terms of plant species) - Tropical rainforest
• 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 arnoldii
• Largest Forest area in India - Madhya Pradesh
• Number of Animal chromosomes - Aulacantha (Radiolarian; 2n=1600)
• Number of Plant chromosomes - Ophioglossum (pteridophyte,  Adler's tongue, 2n=1262)
• Plant cell - Acetabularia (green alga)
• Pollen grain in Angiosperms - Mirabilis
• Primate - Gorilla
• Phylum (of Animals) - Arthropoda

IMPORTANT DATES

• Anti Leprosy Day - 30th January
• Blood Donation Day - 1st October
• Doctor's Day - 1st July
• Human Rights Day - 10th December (To commemorate the  death of Alfred Nobel)
• International Day of Biodiversity - 29th December
• International Thalassaemia day & World - 8th May
• Red. Cross Day - 8th May
• Kisan Divas (National Farmer's Day) - 23rd December
• National Pollution Prevention Day - 2nd December
• Van Mahotsava (Festival of Tree Plantation) - 1st week of February and July
• Vigyan Divas (National Science day) - 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 Wildlife Week - 1st Monday of October

HUMAN BODY

• Largest artery - Abdominal aorta
• Largest bone - Femur
• Largest heterocrine organ - Alimentary canal
• Largest endocrine gland - Thyroid
• Largest gland - Liver
• Largest salivary gland - Parotid gland
• Largest vein - Inferior Vena cava
• Least regenerative capacity - Brain
• Longest cell in the body - Neuron
• Longest cranial nerve - Vagus
• Longest nerve of the body - Sciatic
• Muscles : Number - 639

Smallest muscle - Stapedius

Largest muscle - Gluteus maximus

Longest muscle - Sartorius

• Number of cranial nerves - 12 pairs
• Number of spinal nerves - 31 pairs
• Smallest cranial nerve - Abducens
• Smallest bone - Stapes (2.6 – 3.4 mm)
• Smallest endocrine gland - Pituitary
• Speed of Sneezing - 60-100 miles/hour
• Spinal cord :  Weight - 35g. Length - 42-45 cm