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What are the events that mark the beginning and the end of the third interphase period? What happens in the cell in this period?
The third interphase period is the G2. It starts with the end of DNA replication and ends with the beginning of the first period of the mitotic phase. On G2 the cell is growing too and the duplication of centrioles happens (only in cells that have these structures).
Thomson complete that the ray consisted of a stream of negatively charged particles that had been dislodged from atoms. These particles turn out to be known as electrons. Thomson went on to conclude that the mass of an electron is much less than that of a hydrogen atom.
Later, in 1909 Robert Millikan precisely determined the mass of an electron to be 1/1840 the mass of a hydrogen atom. He as well determined the electron's charge to be 1. This value was acknowledged as a fundamental unit of electrical charge.
Unified Cell Theory The present unified cell theory states that All living things are composed of either a single Cell or of the cells and cell products. The cell is a m
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Q. What are the chemical bonds of the DNA molecule that are broken for replication process to occur? During the DNA replication process, hydrogen bonds between the nitrogen- co
get introduction
Give two cultural practices (not chemical) you could use to control black spot of rose. Based on your current knowledge of the disease triangle, why do you think these cultural pra
what is the biological significance of skeleton
Peroxisomes and Glyoxisomes A number of metabolic reactions, such as, the oxidation of amino acids and lipids result in the production of hydrogen peroxide. As hydrogen peroxid
An interesting observation made by an American biologist H.C. Bumpus (1899) provides a good explanation for normalising selection. Bumpus collected some 136 injured house sparrows
Cell theory is a theory that asserts that the cell is the ingredient unit of the living beings. Before the discovery of the cell, it was not examined that the living beings were
Response to Cold - Responses of Plants to Stress Let us first see what happen to a plant when it is exposed to a cold climate with temperatures below 0°C. If the temperature i
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