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Define in brief about the term - MRI
MRI is a more recent development that was initially introduced as a rival to CT. The technique itself is complex, relying on measurement of the response of hydrogen atoms to radio waves in very strong magnetic field. The MRI scanner measures the tiny magnetic fields that the spinning hydrogen atoms produce, and since the density of hydrogen varies in different types of tissue, the scan data can be computer-processed to generate images. The entire brain can be imaged in successive slices, which can be produced in saggital (side), coronal (front) or horisontal transverse planes. The high resolution of MR images (in comparison with CT images) is a major plus point. A second advantage is that participants are not exposed to radiation sources.
Seed Formation A mature seed has seed coat, an embryo and reserve food material in the endosperm in monocots and in cotyledons in the dicots. Figure shows structure of dicots
Vitamins necessity Vitamins are essential organic substances. They are micro nutrients and required in small quantities. They do not produce any energy by themselves.
Who was Gregor Mendel? The Mendel is considered the father of Genetics. He was a monk, botanist and biologist born in Austria in 1822 and who died in 1884. Throughout the years
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