Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes. Prior to each mitotic division, a copy of every chromosome is created; thus, following division, a complete set of chromosomes is found in the nucleus of each new cell. Indeed, apart from random mutations, each successive duplicate cell will have the same genetic composition as its parent, due to the inheritance of the same chromosome set and similar biological environment. This works well for replacing damaged tissue or for growth and expansion from an embryonic state.
Because the genes contained in the duplicate chromosomes are transferred to each successive cellular generation, all mitotic progeny are genetically similar. However, there are exceptions. For example, there are genetic variations that arise in clonal species, such as bacteria, due to spontaneous mutations during mitotic division.
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When traveling at 55mph, that's enough time to cover the length of a football field blindfolded” (2009, VTTI). Driving has become an automatic process for most of us who drive therefore many drivers will divide their attention to a few tasks at the same time while driving.
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Hello. You did not put the answer options, but the role of moss in the transition to stage III is the creation of protonemes where the gametes that will act in stage III will be formed.
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Stage III consists of the fertilization of the female gamete of the moss with the male gamete of another moss, thus creating a zygote that will give rise to other mosses in the future.
Moss is very important for this phase, because it will be responsible for creating a structure called protonemas. In the protonemas are the gametophytes that will have a structure called gametangium that will allow the formation of gametes.
Fossil fuels, oil, natural gas and coal
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In the pre-classical age (8000 B.C.E. to 600 B.C.E.) the first states developed in core civilizations. Then, powerful cities imposed their rule on surrounding areas through conquest and the first empires were born. In the classical age (600 B.C.E. to 600 C.E.) empires grew on a massive scale through territorial conquest with large armies. The growing scale of these empires, along with their increased ethnic and cultural diversity, required more sophisticated methods of governance. They served as major hubs of transregional networks of trade, and they diffused culture, religion, technologies and disease. As empires acquired massive wealth, the unequal distribution of this wealth across social classes placed enormous pressure on the political and social order. Eventually, all of the classical civilizations could not deal with the problems created by their own internal or external crises. In most cases, the belief systems spawned in these empires left enduring cultural footprints even as the empires' political structures disintegrated.
