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Darwin while evolving the concept of natural selection laid emphasis on competition among individuals belonging to a species, that is intraspecific competition. Here the individuals compete for almost identical requirements from the environment. Competition between individuals belonging to different species, that is interspecific competition is also observed in nature. In the following subsection we shall discuss the essential differences between the two types of competition, and subsequently highlight the role of natural selection in evolving coadapted colnmunities of closely related species.
Which are plant tissues that form the plant roots? Roots have a central portion called medulla made of vascular tissue outer phloem and inner xylem. Medulla is delimited by per
Causes of Air Pollution We known about the composition of atmosphere, its major and minor constituents. The composition of atmosphere has remained the same for thousands of y
what are the biological significance of skeleton
PARATHYROID DISORDERS - (i) Hypoparathyroidism (deficiency of PTH) . It causes the lowering of blood calcium level. This increases the excitability of nerves and muscles, caus
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functions of arteries in mammals
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Immediate Post-operative Care The patient is accompanied to the ICU by a surgeon, anesthetist and the nurse who assisted for the surgery with portable ventilator and ECG
Many endangered plant species are currently being propagated by commercial growers and botanical gardens and the sold (as both plants and seeds) to government agencies. Conservatio
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