Hello, I am looking for someone to write an article on Summary of Articles. It needs to be at least 1250 words. The tumours or the gall formation that are sometimes noticeable is a result of uncontrolled growth of cells just like in cancer but these are mostly caused by bacteria, virus, fungus or structural damage in plants. For example, crown gall is caused by Agrobacterium tumefaciens while the black knot is caused Dibotryon morbosum.

Dr. Pell further explains that in some cases this uncontrolled growth of tumour tissue offers ecological benefits as well by helping insects. Gall wasps such as Callirhytis cornigera and C. quercuspunctata affect oak trees by laying eggs in the newly developing tissues of the plants. The plant responds by producing new tissues around the eggs thereby lending protection and providing nutrition for the larvae of the insect. However, not much is known about the mechanism of this biological symbiosis.

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This article is primarily based on an article published in the research journal of American Anthropology by leading researchers Dr. F. Hole and Dr. J. Corriston who investigated the origin of agriculture and the need to do so. Archaeologists and historians have long tried to find out the exact origin of agriculture and it was only recently, that they successfully proved that the origin of transition from depending on wild grassed to growing cereals lied within an area of 50-100 miles of the Dead Sea. The article further reports about a new thesis that the researchers proposed to explain why people were driven towards agriculture. According to this thesis, climate change and over-exploitation of Nature led to the invention of agriculture. This article further highlights the fact that the researchers believe that the inventors of Agriculture belonged to Natufian culture since theirs was the culture that preceded the time span since the domestication of plants appeared. The researchers confirmed that the Natufians, unlike nomads, led a settled life, showed societal ranks and ate gazelles, deer, wheat and barley. They also used tools&nbsp.such as sickles and stone mortars and hence it is plausible that the Natufians had the technology to grown and cultivate plants and store the seeds. The theory further explores the fact that around 12,000 years ago the Natufian culture came under environmental stress owing to climate change.

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