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The distinction between positive and negative notions of freedom can be traced to Isaiah Berlin and his 1936 essay: "Two Concepts of Liberty". Negative freedom is defined as freedom from obstacl...

Immobilised enzymes are enzymes that have been trapped into an inert matrix or material (such as calcium alginate) which prevents them from moving during the reaction process. Whole cells such as yeast an...

Think about it as 'What numbers can be x to get 4'. Remember that when you square a number the answer is always positive? Here is a situation in which it's important to consider both of the possible solut...

Whenever two or more waves travelling through the same medium at the same time pass through each other, the net displacement of the medium at any point in space-time is simply given by the sum of the indi...

There are two main parts to meiosis - meiosis I and meiosis II. In meiosis I, crossing over of homologous chromosomes occurs during prophase I, allowing exchange of genetic material between the two parent...