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(a) Give two examples of diseases which can be spread by contaminated drinking water.
(b) How can the spread of such diseases be prevented?
(a) Typhoid and cholera can be spread by contaminated water.
(b) The spread of such diseases can be stopped by (i) Effective disposal of sewage,
(ii) Purification of drinking water.
What is crossing over? In which period of meiosis does this event occur? Crossing over is the eventual exchange of chromosomal fragments among homologous chromosomes. The pheno
Determine the change in the amount of intracellular chloride Complete motor neuron is removed from a frog and placed in a large volume of normal physiological saline. The neur
Do beings of the class Reptilia perform gas exchange in the same way amphibians do? These beings do not have permeable skin so they do not make cutaneous respiration such as a
What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the description of how species emerged (phylogenesis) is fixism.
The evolutionary species concept which identifies a species as a "lineage (i.e. ancestor descendant sequence of population) evolving separately from others with its own unitary ro
Determination of vitamin c Majority of chemical methods of determination is based on the rapid oxidation of ascorbic acid and therefore not too highly specific. Titration of
Body temperature is homeostatic ally regulated around a set point. Given your knowledge of negative feedback and homeostatic control system, predict whether narrowing or widening o
Explain about the Nucleoproteins? Nucleoproteins are combinations of nucleic acids land simple proteins, which usually consists of a large number of basic amino acids. Nucleopr
Q. On which organelle of the cell structure does intracellular digestion depend? What is the chemical content of those organelles? Intracellular digestion take place by the act
briefly explaintransport system in earthworm
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