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In the preceding block you learnt the Darwinian premise of natural selection based on certain facts and deductions thereof. You would have noticed that one of the foundations for the concept of natural selection relates to competition among the individuals belonging to the same species - the intraspecific competition. You may also recall that intraspecific competition involves two components - (1) the individuals belonging to the same species compete among themselves for thc same requisites from the eilvironment which results in physical competition, including the competition for mates and the individuals belonging to a species may compete as to which of them leaves behind a major share of descendents in the future populations. The second type of competition is more subtle, by which is meant that individuals do not compete directly or in any physical way. The success of the second type of competition is measured in terms of the survival of offsprings, and therefore alleles in the next generation. You might have by now deduced that the two types of competition are interrelated. Success in the first type of competition known as ecological intraspecific competition is a prerequisite for success in the second type of competition namely reproductive intraspecific competition. It does not mean that ecological success always ensures reproductive success, for ecologically successful individuals may be sterile; but ecological success is always necessary to achieve reproductive success. We may then summarise that intraspecific competition results in adaptations to a given environment and this helps to perpetuate the genotypes of successful individuals generation after generation.
State the term - localisation scales The localisation scales are also empirically derived, being based on studies of patients with localised brain lesions. There are frontal,
Chemoreceptors These are receptors included in perception of chemical stimuli. You will see that there are three kinds of Chemoreceptors among metazoans: i) Those concerne
sea divisions
What concentrations of succrose gradient are used to separate between the two types of endoplasmic reticulum please?
COMMON DISEASE OF PIG - 1 . FOOT AND MOUTH DISEASES 2 . ANTHRAX 3 . TUBERCLOSIS 4 . SWINE FEVER - Charactrized by high fever, d
What would happen to a cell if it was placed into a hypertonic solution? Into a hypotonic solution? What would happen to a cell if the cell itself was hypertonic to the solution?
Describe what is Circulatory Support and Inotropes ? Colloid or Crystalloids: Hypotension after PGEl infusion is common. It is the result of relative intravascular volume deple
With the survival and well-being of humans beings so heavily dependent on biodiversity, its economic value assumes considerable importance. For instance the economic value of ecosy
Automated DNA sequencing is now common place which is based on the chain termination method but using a fluorescent dye attached to an oligonucleotide primer instead of using radio
Q. What are the events that mark the end and the beginning of the first interphase period? What happens inside the cell in this period? The initial interphase period is the G1.
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