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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.
Q. Explain the types of basic forces? Compression: This refers to the squeezing of the test material so that it still remains as a single undivided unit but may occupy less v
Only during recent years, due to commercialization of agriculture, more emphasis has been given on cash crops, which contribute very little to the animal food. As a result, the liv
What is an operon, and in what type of organism are operons found? An operon is a series of genes that code for exact products and the regulatory elements that control those ge
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what is the structure of ecosystem
Q. What is the difference between spermatocyte II and spermatocyte I? The spermatocyte I (2n) undergoes the first division of meiosis (meiosis I) originating two spermatocyte I
Q. What are the major parts of ferns? Ferns are constituted by small roots that come downwards from the rhizome stem and often horizontalized. The fronds also arise from the rh
The evolutionary species concept which identifies a species as a "lineage (i.e. ancestor descendant sequence of population) evolving separately from others with its own unitary ro
the body cavity in roundworms is
Define Buffers and Buffer Solutions? Solutions containing both weak acid and their salts or solutions containing weak hydroxides and their salts are referred to as buffer solut
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