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Explain the Discovery of Cell
Let us study here about the scientists who played a pioneer role in discovering the basic component of any living organism -the cell. Robert Hooke (1665) is credited with the discovery of cell. Hooke observed a honeycomb-like pattern in a very thin slice of cork as shown in the Figure. As you can see, this honeycomb-like structure consists of a thick wall, enclosing box-like compartments for which he coined the term cellulae for the first time and this term is synonymous to what we call as cells. He regarded cellulae as passages for conducting fluids.
Antony Van Leeuwenhoek, on the other hand, was the first to observe free cells. You may already be aware that these are single organisms.
Explain the Factors Controlling Movements of Gall Bladder Contraction of gall bladder can be controlled by reflex action, by the presence of foodstuff in the duodenum and by th
Define the Regulation of Glucocorticoid Secretion Glucocorticoid secretion is mainly controlled by ACTH or adrenocorticotropic hormone from the anterior pituitary gland. In any
INTRODUCTION : This exercise is based on here 'Laws and Regulations' of this course. What are we going to do in this exercise? - This might be the question arising in your mind. I
The difference between hard and soft water Collect some hard water from a stream(or make some as defined in the next experiment). Also secure some soft water like as rain wate
Availability of Nutrients: The nutrients in the upper layers of water are constantly being taken up by the phytoplankton, who are the producers, and then these pass on to th
What is vision and how is it connected to the brain?
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The Fume Cupboard : If a reaction uses or produces harmful gases, dusts or vapours, it poses a risk of inhalation. Such reactions should be carried out not on an open bench but in
discuss the importance of society and culture to existence of man .
a) Name the primary minerals present in an igneous rock. a ) Quartz (SiO2), feldspars, amphiboles, pyroxenes and micas are the most common primary minerals in igneous rock
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