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Which physical elements contributed to the great amount of available energy on the primitive earth at the time of the origin of life?
3.5 billion years since the water cycle was faster than today, resulting in hard storms with intense electrical discharges. There was as well no chemical protection from the ozone layer against ultraviolet radiation. Temperatures in an atmosphere and on the planet surface were very high. Electricity, radiation and heat constituted large available energy sources.
Explain the Solid-Liquid Equilibria? A freezing-point curve (freezing point as a function of liquid composition) and a solubility curve (composition of a solution in equilibriu
Q. What are some examples of parasitism? The Classical instances are the parasites of humans (host), like the trypanosome that causes Chagas' disease, the HIV virus (AIDS), the
What is the logical order in which the concepts of atoms, molecules, cells... up to biosphere are associated? Atoms form molecules that structure cells that form tissues that f
Mineralisation and Humification As a result of physical weathering, the rocks are broken down into smaller particles. But this is not the true soil, and plants cannot grow well
What are the types of cell respiration? There are two types of cell respiration: aerobic cell respiration, a reaction with participation of molecular oxygen (O2), and anaerobic
Q. Is there vaccine against tuberculosis? The vaccine against the tuberculosis is called as BCG (bacillus Calmette-Guérin). BCG is not used in a few countries where tuberculosi
Describe the structure of the intestines. How are they modified to carryout their functions? How does the human intestine compare to the fetal pig?
Amoeboid Protozoan Amoeboid protozoan are distinguished by the presence of flowing extensions of their body known as pseudopodia. These are used for feeding and locomotion. Th
Explain What is the optimum temperature for catalyses? Ans) For any chemical reaction, the reaction rate enhances with temperature, so the higher the temperature, the earlier t
BLOOD COAGULATION - DEFINITIO N - The property of blood to change from fluid to gel state within a few minutes of its coming in contact with air is called blood coag
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