what are heterotrophic nutrition? what are the different types of heterotrophic nutrition found in plants ? define and explain each given exaplain
ANS: Heterotrophic Nutrition – Types Of Heterotrophic Nutrition With Examples
December 21, 2020 by Veerendra
Heterotrophic Nutrition – Types Of Heterotrophic Nutrition With Examples
Types Of Heterotrophic Nutrition
Heterotrophic Nutrition - Types Of Heterotrophic Nutrition With Examples 1
Heterotrophic Nutrition:
It is a mode of nutrition in which the organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs. Heterotrophic nutrition is of three types parasitic plants , insectivorous plants , symbiotic plants
Parasitic Plants:
A parasitic plant is one that partially or completely depends on another plant (called host) for nutrition.
Usually, parasitic plants develop special roots, which penetrate into the tissues of the host plant. The prepared food is generally absorbed from the root or the stem of the host plant. Some examples are Cuscuta (dodder) and mistletoe.
Insectivorous Plants:
Insectivorous plants are plants that derive some or most of their nutrients by trapping and consuming animals, mainly insects. These plants mostly grow in places where either the soil is deficient in certain nutrients (e.g., nitrogen) or too little light is available to carry out photosynthesis.
Hence, these plants need to obtain the required nutrients from other sources. Some examples are the pitcher plant, Drosera (sundew), bladderwort, and the Venus flytrap.
The leaf of the pitcher plant is modified to form a tubular pitcher-like structure. The inside of the pitcher is lined with downward pointing hair that do not allow any trapped insect to climb up and escape. The fluid at the bottom of the pitcher contains digestive juices that digest the insect.
Symbiotic Plants:
Certain plants live in association with other organisms, share food and other resources. Both the types mutually gain from each other. Such plants are called symbiotic plants and the relationship is called symbiotic. A good example is lichens.
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Heterotrophic nutrition can be one of three types – holozoic, saprophytic or parasitic. Holozoic nutrition can be seen in most vertebrates and some unicellular organisms like the amoeba. Saprophytic nutrition is where the organisms feed on dead and decaying matter. Examples include bacteria and fungi
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