Question
Define drug abuse.
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Answer
Taking of drugs for the purpose other than medicinal use in such an amount that it impairs physical, physiological and psychological functions is called drug abuse.
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A recombinant DNA molecule was created by ligating a gene to a plasmid vector. By mistake, an exonuclease was added to the tube containing the recombinant DNA. How does this affect the next step in the experiment i.e. bacterial transformation?
Name the source of gonadotropins in human females. Explain the changes brought about in the ovary by these hormones during menstrual cycle.
OR
Describe how the changing levels of FSH, LH and progesterone during menstrual cycle induce changes in the ovary and the uterus in human female.
OR
Describe how the changing levels of FSH, LH and progesterone during menstrual cycle induce changes in the ovary and the uterus in human female.
In the following table of interspecific interactions, fill the blanks with (+) sign for beneficient interaction, (-) sign for detrimental and 0 for neutral interaction.
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Species A
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Species B
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Name of Interaction
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+
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Mutualism
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-
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Competition
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-
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Predation
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+
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Parasitism
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+
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Commensalism
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0
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Amensalism
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Describe a palindrome with the help of an example.
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How many trophic levels human beings function in a food chain?
- A bacterial cell is shown in the figure given below. Label the part 'A' and 'B'. Also mention the use of part 'A' in rDNA technology.
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What are the shortcomings of the graphic representation diagrams that give data of existing organisms?
Describe the experiments that established the identity of 'transforming principles' of Griffith.
Explain the role of diazotrophs in nitrification.