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Food + oxygen -> carbon dioxide + water + energy
Food is not only a source of energy, but also the nutrients used to build up the organisms' bodies. So we see that nutrients and energy are combined into one entity, food, during photosynthesis. This food may be taken by the other organisms from green plants. So far we have seen that, green plants are called producers because they produce their own food. Plants live and die, they may be eaten up by animals who also eventually die. There are organisms - the decomposers which act on dead plants and animals and for their existence they decompose the substances which form these dead bodies. In other words, the decomposers, such as bacteria, fungi and worms, convert the material of the plants and animals back to their elementary forms. Besides the producers and decomposers, there is another category of organisms - the consumers. These organisms cannot make their own food, and they depend directly or indirectly on producers, for energy and nutrients. Consumers include herbivores, animals that eat plants; carnivores, animals that eat other animals; and omnivores, animals that eat both plants and animals. Deer, duck, goat, and cow are examples of herbivores. Some human beings who are vegetarian by choice, could also be considered as herbivores. Wolf, tiger, cat, dragonfly, and eagles are all carnivores; rats and most human beings are examples of omnivores.
Biochemical Evidence: As we had said earlier in section 13.2, Darwin had recognized that humans and the great apes shared many physical characteristics. This led him to co
Conversion of oxaloacetate to phosphoenolpyruvate Conversion of oxaloacetate to phosphoenolpyruvate: In this reaction, oxaloacetate and guanosine triphosphate (GTP) are
Astronomy and Physical Sciences: Astronomy was used not only for working out the calendar, the dates of the eclipses and for the determination of time but also for casting h
Explain Nasal secretions and Cerumen Nasal secretions: These can destroy harmful organisms due to lysosomal activities. Cerumen (wax of ear): It traps and kills the bacteria
Explain Rh Blood Grouping System Some individuals also have a so called Rh antigen on the surface of their RBCs. Those who have it are called Rh (+) and those who do not have i
economic importance
ACCIDENT REPORTING To start with, let us explain two closely related words, accident and incident. Accident is an unexpected or unplanned event. It may cause i) Harm to s
Reactions of Carboxylic Group Salt formation: In alkaline medium, XOOH group reacts with metal hydroxide to form amino acid salts.
why did the horse evolve
PROCEDURE Locate the gas cylinders available in the lab. Note the colour of the cylinder (to a maximum of two and exclude the LPG) and bands on it (if any) and record them i
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