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y An autotroph[], or producer , ishttp://i.acdn.us/image/A6940/694015/300_694015.jpg 

an organism that produces complex organic compounds (such as carbohydrates, fats, 

and proteins) from simple inorganic molecules using energy from light

(by photosynthesis) or inorganic chemical reactions (chemosynthesis). 

y They are the producers in a food chain, such as plants on land or algae in water. They

are able to make their own food and can fix carbon. y Therefore, they do not use organic compounds as an energy source or a carbon source.

y Autotrophs can reduce carbon dioxide (add hydrogen to it) to make organic compounds. 

y The reduction of carbon dioxide, a low-energy compound, creates a store of chemical

energy.

y Most autotrophs use water as the reducing agent, but some can use other hydrogen

compounds such as hydrogen sulfide. 

y An autotroph converts physical energy from sun light (in case of green plants) into

chemical energy in the form of reduced carbon. 

y  The insectivorous plants have chlorophyll in their leaves and can prepare their food by

the process of photosynthesis. y  These plants grow in places, which are deficient in nitrogen and sulfur such as marshy

areas.

y  This deficiency effects the growth and development of these plants. 

y  Their nutritional needs of proteins are supplemented by small insects which are trapped, 

digested and absorbed by the modified leaf parts. 

y  Examples of insectivorous are pitcher plants, Venus fly trap etc. 

y  Par asitic nutr ition is a mode of nutrition where organism (known as a parasite) lives on

the body surface or inside the body of another type of organism and obtains nutrition

directly from the body of the other organism (known as a host). 

y

Since these parasites derive their nourishment from their hosts, this symbiotic interaction is often described as harmful (to the subject of host). 

y Most parasites are so tiny in size and some are even invisible to the naked eye of a

human. Many parasites have complex life cycles involving multiple hosts. 

y  Saprotrophic nutr ition is a process of chemo heterotrophic extra-cellular 

digestion involved in the processing of dead or decayed organic matter which occurs in

saprotrophs or heterotrophs, and is most often associated with fungi, for 

example M ucor and Rhizopus. The process is most often facilitated through the active

transport of such materials through endocytosis within the internal mycelium and its

constituent hyphae.[1] 

y  Although carnivorous plants do include predatory species that trap, kill and digest animal

victims, none of them are "man-eating."

y  Contrary to some sci-fi movies, there are no carnivorous plants capable of trapping people.

Some tropical pitcher plants may be large enough to trap small amphibians, but generally their

diet is chiefly insects. The huge Malaysian arum called "devil's tongue" or krubi

(Amorphophallus titanium) may produce an erect flower stalk or spadix over 8 feet (2.4 m) tall

from a huge vase-shaped, pleated spathe over four feet (1.2 m) tall and 12 feet (4 m) in

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circumference. This floral giant develops from a tuber measuring 6 feet (2 m) in circumference

and weighing over 100 pounds (46 kg).

y  Although it may appear like a giant carnivorous plant, it is completely harmless to people--

unless you take a deep breath of its foul, carrion-like stench.

y  The enormous blossom generates such an overwhelming smell that people have been known to

pass out from taking too close a whiff.

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