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Q. Define biogeographic realm?
Biogeographic regions are large areas that contain characteristic assemblages of animals and plants, d elineated on account of natural barriers such as oceans, mountains and deserts. A biogeographic region is generally characterised by high levels of species endemism.
Boundaries between biogeographic regions are called "biogeographic lines".
Examples are:
· Wallace's line between Southeast Asia and Australia (between Sundaland and Wallaceae), and · Kangar-Pattini line between India and Myanmar.
The marine environment is three-dimensional with a distinct vertical zonation, each having its distinct associated species. Accordingly in a particular oceanic region, intertidal areas, the upper layers of the open ocean and the deep sea have very different assemblage by species.
Explain the Dark Adaptation of Vitamin A? In the early stages of VAD, the individual cannot see objects in dim light. This' phenomenon is used as a criterion for assessment in
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In which parts of the circulatory system are there valves? There are valves in the heart (between each atrium and ventricle, in the aorta and pulmonary artery), in some of the
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The Amazon rainforest in South America is a biodiverse ecosystem. There are large numbers of plant and animal species making up the food web, including over 350 species of predator
Definition and applications
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Briefly explain the following feeding mechanisms in holozoic organisms: filer feeding,fluid feeding and deposit feeding.
How are the heterotrophic beings divided in the ecological study of food interactions? The Heterotrophs are divided into consumers and decomposers. An ecosystem can survive wit
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