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  • Organisms and Population (part-2)

    The number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration is termed as Immigration

    Jan 24, 2013
  • Organisms and Population (part-1)

    The basic concern of ecology is with four levels of biological organisation – organisms, populations, communities and biomes

    Jan 24, 2013
  • Biotechnology and its Applications (part-2)

    Insertion of genes into an individual’s cells and tissues to treat diseases especially hereditary diseases is called as gene therapy. The mechanism of gene therapy is based on the replacement of a defective mutant allele with a functional one or gene targeting which involves gene amplification.

    Jan 24, 2013
  • Evolution part 2 trial 4 640 X 480 600 kbps

    Test file

    Jan 24, 2013
  • Evolution part 2 trial 3 640 X 480 600 kbps

    Test file

    Jan 24, 2013
  • Biotechnology and its Applications (part-1)

    Transgenic animal is the animal that has had their DNA manipulated to possess and express an extra (foreign) gene. Transgenic rats, rabbits, pigs, sheep, cows and fish have been produced, although over 95 per cent of all existing transgenic animals are mice

    Jan 24, 2013
  • Biotechnology: Principles and Processes (part-2)

    Ecognition sequence for Hind II is the specific base sequence. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria each of which recognize different recognition sequences.

    Jan 23, 2013
  • Biotechnology: Principles and Processes (part-1)

    Biotechnology is a type of practical biology which involves the use of living organisms and bioprocesses in engineering, technology, medicine and other fields . Biotechnology also utilizes the byproducts for development purpose.

    Jan 23, 2013
  • Molecular basis of Inheritance - Important Questions & Preparation Tips

    In this article you will get the clue that from where and how the questions are being framed from the chapter Molecular basis of Inheritance

    Jan 21, 2013
  • The d-and f-Block Elements (Part-1)

    Those elements having a partially filled d or f subshell in any common oxidation state are said to be transition elements. The term "transition elements" most commonly refers to the d-block transition elements.

    Jan 21, 2013
  • The d-and f-Block Elements (Part-2)

    Melting and boiling point of d & f block elements are very high (except Zn). These higher values are due to small atomic radii of transition elements which provides greater inter atomic forces of attraction.

    Jan 21, 2013
  • The p-Block Elements (Part-2)

    The molecule of ammonia is trigonal pyramidal with the nitrogen atom at the apex. It has three bond pairs and one lone pair of electrons as shown in the structure.

    Jan 21, 2013
  • The p-Block Elements (Part-1)

    Atomic sizes, ionization enthalpy, electron gain enthalpy and electro negativity are the parameters witch influence the properties of p-block elements like that of others

    Jan 21, 2013
  • General Principles and Processes of Isolation of Elements (Part-2)

    The process of metallurgy and isolation should be such that it is chemically feasible and commercially viable. Still, some general principles are common to all the extraction processes of metals.

    Jan 19, 2013
  • General Principles and Processes of Isolation of Elements (Part-1)

    A naturally occurring inorganic solid, whose chemical composition is definite, and having an  ordered atomic arrangement is called as mineral. This may seem a bit of a mouthful, but if you break it down it becomes simpler. In the same way we can define one more basic term like an ore. A type of rock that contains minerals with important elements including metals is called as ore.

    Jan 19, 2013

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