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Evolution: This deals with the origin of newer types of organism from the previous ones by modification involving genetic changes and adaptations. Evolution also called as biological & organic evolution it is the change over time in one or more inherited traits found in populations of organisms. Evolution can occur when there is variation or change of inherited traits within a population. The big sources of such variation are genetic recombination, mutation or gene flow.
There are four general mechanisms of evolution. The first mechanism is called as natural selection, this is a process in which there is differential survival or reproduction of organisms that differ in one or more inherited traits. The second mechanism is genetic drift, it is a process in which there are random changes to the proportions of two & more inherited traits within a population. The third mechanism is known as mutation that is a permanent change in a DNA sequence. And finally, the fourth mechanism is gene flow this is the incorporation of genes from one population into another.
Of which substance do elastic fibers of the connective tissue are made? What are some functions of these fibers? The elastic fibers are made of a protein called elastin. Ela
General requirements of implant materials 1) Biologically compatibility: an ideal implant material will elicit mainly physiological reactions within the surrounding tissues (bo
Are nematodes exclusively parasites? There are parasitic roundworms, containing parasites of plants, but there are also free-living nematodes.
Define requirements of Sodium during pregnancy period? As you know, sodium plays a role in fluid balance. Sodium metabolism is altered during pregnancy under the stimulus of a
Mosaic and Regulative Eggs Eggs as well as early cleavage embryos are occasionally divided into two categories: i) Mosaic or determinate embryos and ii) Regulative or i
What are plant hormones? Plant hormones, also known as phytohormones, are substances that control the embryonic development and the growth of the adult plant.
EXCRETIO N IN EARTHWORM - Main organs are nephredia, pharyngeal, integumentary & septed nephredia. Main are septal nephredia situated on septa.Nephrostome present. Body
Organizational assessments are vital to the introduction of Nurse Case Management (NCM) and Clinical Nurse Leaders (CNL) ( I am in school for the CNL) Use the guidelines below
ORGNELS WITH SINGLE WALL
Decomposers - Biotic Components Also known as saprotrophs. Mostly, these are microscopic and are heterotrophic in nature. Decomposer organisms obtain their energy and nutrient
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