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What is the spontaneous generation hypothesis?
The spontaneous generation hypothesys, or abiogenesis, asserts that life on earth has come from nonliving material. For instance, the fact that with time rats appeared around waste was considered in the past a confirmation of this hypothesis. Some supporters of spontaneous generation associated it with the existence of an active principle (the vital elan) that would be the source of life, a theory called as vitalism.
Origin of Life - Image Diversity: abiogenesis
Classify biomaterials and list some examples. Biologic classification is based on tissue response and systemic toxicity effects of the implant and is divided into three classes
Factors Limiting the Productivity of Aquatic Habitats Sunlight and oxygen are the two most important limiting factors of the aquatic ecosystems. This distinguishes them from t
Insect resistant crops (IRC) Should reduce use of insecticides. This is beneficial to environment because: - More beneficial insects around as they are not killed by in
Chemotaxis - Modes of Cell Movement Chemotaxis considers to me directed movement of cells in response to a concentration gradient of a chemical factor in solution. An instance
Q. Optional use values of biodiversity? Optional values are associated with potential use in the future. Accordingly one opts to conserve biodiversity based on the hope that it
How Simple Transposition of the Great Arteries Present after 30 Days ? A switch operation will have poor results, as the ventricle that has regressed will not be able to mainta
Management In case of small defects surgical treatment is not indicated because spontaneous closure may occur before one to two years of age. Patient is treated for conges
What do you mean by branchial basket? In ascidian adults the pharynx is enlarged to form branchial basket. Pharyngeal openings in wall of the basket allow water to pass through
This is concerned more with nature's services which also make vital contributions to the welfare of society and to ecological processes without which our planet would be uninhabita
Genetic Diversity of Population The biological diversity of animals, plants, and microorganisms is of fundamental importance to human survival. The term "gene resources" may b
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