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Explain the term- lichens
The lichens are able to extract nutrients from the rocks . They are capable of retaining water for a long time during which chemical processes take place, e.g. alumino-silicates which are important components of rocks are converted to simple clay molecules by the process of hydrolysis and carbonation.
modes of nutrition and their examples
Although certain physiological aspects of disposition of substances by organs within the body had received atten-tion earlier, it was in 1937, with the seminal work of Teorell, tha
The Sun is the most important star from our point of view. It is the only star close enough to be studied in considerable detail. The grandeur of the Sun is partly because of
Burns : There are two types of burns which we are to discuss: 1) Chemical 2) Thermal Chemical burns have already been discussed in Sec. 16.7; so we shall discuss thermal
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Explain physical barrier for External Defence Mechanism - Skin It provides nice protective covering to the body. The outer layer- horny layer - contains dead keratinized cells
Photosynthesis: Carbon dioxide + water + solar energy + minerals -> food + oxygen Food made during photosynthesis may later be used for energy by the plant itself, or by a
INTRODUCTION : Gas, Electricity and water are integral parts of any science laboratory. You would have realised from personal experience (if any) and in the course of your study o
Discuss main factors that influence mass movements. Ans) Things as if climate and food availability will make a big dissimilarity if it is too cold, too dry then people will re
Explain Transverse colon and Descending colon Transverse colon: This is a loop of colon which extends transversely across the abdominal cavity in front of the duodenum and th
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