Biology

Father of Virology W.M. Stanley (American Microbiologist). Single virus observed under electron microscope, outside host is called “Virion”. Caulimo virus (cauliflower mosaic virus) are double stranded DNA virus

Golden dart poison frog from South America is the most poisonous frog. One adult frog contains enough poison to kill 2200 people.

Roots provide more than 50% of total food. Acaulescent. Having a reduced stem. Allyl sulphide. Characteristic smell of Onion and Garlic. The anticancerous substance in garlic is gernium. Petiole develops last in the leaf. CTC tea leaves are rich in iron because they are cured in iron pans.

Bateson is called father of modern genetics. Southern blotting technique is used for separating DNA fragments and identification of cloned genes. The frequency of an allele in an isolated population is due to genetic drift. HDN was earlier known as erythroblastosis foetalis. Gel electrophoresis and autoradiography are employed in nucleic and blotting.

Nostoc is found in aquatic and terrestrial habitat. The alga forms a jelly like mass in which numerous filaments are embedded. When young, they are more or less spherical, solid and microscopic in size. With advance in age, the colony grows and becomes macroscopic. In species like N. amplissimum it attains the diameter of 30cm or almost equals to the size of hen's egg in N. punctiforme. A number of species of Nostoc on soil. They often swell up and glisten after rains and therefore called...

Mendel also observed that flower colour and colour of the seed coat may not assort independently. Independent assortment is shown by the alleles present on different loci. Recombinant DNA is also called chimeric DNA.

Sieve cells or sieve tube elements resemble RBCs in being without nucleus in the mature state. The wood of Tectona grandis is termite resistant. Wood without vessels is called homoxylous. Whereas with vessels is called heteroxylous. The bottle cork is prepared from cork of Quercus suber (Oak tree).