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Elaborate Evolution by Natural Selection ?
The conelaboratecept of natural selection lies at the heart of Darwin's Theory of Evolution. Darwin understood that plants and animals being raised for food or show in his day were selectively bred, or artificially selected for certain valued traits. Darwin came to understand that environmental factors such as predators, food supply, physical habitat, and climate functioned in much the same way to select and favor specific characteristics or traits. Those organisms within a population that could effectively reproduce in a given environment would be able to reproduce effectively.
Evolution might have occurred as described in the example below. Genetic recombination leads to variation among the individuals of any population, in this case, in the neck length in a population of giraffes. In a changing environment, food resources is consumed in order of accessibility. As food becomes scarce, most giraffes suffer from poor health, or starvation. However, giraffes with longer than normal necks are able to reach more food, and have an advantage in surviving to produce offspring, who are genetically likely to be longer necked as well. Over time, by natural selection, the population evolves into one of longer necked giraffes.
In what ways is water lost from the body? Water is lost from the body by a) Evaporation (lungs and skin), b) Urination and defaecation (faeces always have water).
Explain the Dietary diversification - Iron Deficiency Anaemia? It aims to ensure that deficient populations have access to foods rich in iron and also foods rich in vitamin C (
By prodigality of nature it is meant that organisms have an enormous potential to reproduce. A carp or salmon is known to lay over a million eggs. A frog may lay Bs many as 12,000
Q. Describe about Cardiomyopathy due to Persistent Tachycardia? In occasional cases, particularly in children recurrent or incessant episodes of supraventricular or ventricular
Explain Prosoma in details. First tagma of a cheliciform consisting of the first six segments of the body. Appendages on the prosoma are involved in locomotion and feeding. Pro
What are the typical vegetation and the typical fauna of the deserts? The predominant fauna of desert ecosystems is produced by reptiles, as lizards and snakes, terrestrial art
Q. Describe Postpartum Cardiomyopathy? It is defined as presentation of LV Systolic dysfunction and heart failure in last trimester of pregnancy or within 6 months of delivery.
Describe Congenital Pulmonary Stenosis? The murmur present since birth. PS may be valvular, sub-valvular, or supravalvular. An obstruction may occur within the RV cavity by an
Define Preterm and Low Birth Weight? The foetal and neonatal health is mainly dependent on the birth weight and it has been well recognized that perinatal (from birth upto one
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
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