Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.
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Land use involves the management and modification of natural environment or wilderness into built environment such as settlements and semi-natural habitats such as arable fields, pastures, and managed woods. Land use by humans has a long history, first emerging more than 10 thousand years ago. It has been defined as "the purposes and activities through which people interact with land and terrestrial ecosystems and as "the total of arrangements, activities, and inputs that people undertake in a certain land type. Land use is one of the most important drivers of global environmental change.
Answer:
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The three gases that are part of Earth’s cycles in both the atmosphere and biosphere are:
- oxygen
- - nitrogen
- - carbon dioxide
<h3>Explain your answer?</h3>
The oxygen, nitrogen, and carbon dioxide are the three gasses that are constantly moving through the atmosphere and biosphere in their own respective cycles.
The oxygen is used by the animals for breathing, but it is also released as a byproduct by the producers. The nitrogen is used as a food source for the producers, as well as the carbon dioxide which is crucial for the process of photosynthesis.
Thus, Part of them is released through decomposition, part by releasing them in the atmosphere or in the soil.
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The nurse should explain the newly diagnosed lung cancer client that the reason why his tumor metastasized so fast without displaying many signs/symptoms is that: the malignant tumors affect area tissues by releasing enzymes and toxins that make the other normal cells to differentiate uncontrollably.
Metastasis is the property of spreading of cancer cells. When the tumor at a location in the body starts spreading top other locations as well, it is said to be metastasizing.
Malignant tumors are those that metastasize. They travel to near or distant locations at the body and start dividing. These are cancerous in nature.
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