First The meaning of sublimation is a chemical process where the solid change into a gas without going through the liquid stage.
The conditions necessary to occur are:
1- Need the pressure to be lower than the triple point.
2-The temperature must be high enough to produce a gas.
3-The substance must be in its solid state.
Answer:
directional selection
Explanation:
Directional selection is the most common type of natural selection and occurs when some individuals with characteristics favorable to the conditions of the environment in which they live, have survival advantages over individuals who do not have this advantage, who end up dying.
Imagine, for example, a graph showing the directional selection in the same species of moths. Moths of the same species have white and brown collations, in summer, brown moths can camouflage themselves on tree trunks, while white moths cannot and are easily captured by their predators, which means that the amount of white moths decrease. In this graph, the population of white moths would be at a minimum, at the same time that the population of brown moths would be at maximum.
However, with the arrival of the reverse, snow begins to cover the trees, allowing white moths to camouflage themselves more easily. The brown moths, then, are very exposed to predators, causing their population to reach the minimum while the population of white moths reaches the maximum.
Gatrectomy is a procedure that involves removal of a part of the stomach (partial gastrectomy) or the whole stomach (total gastrectomy). It is carried out to removal stomach cancer or stomach perforations. In this case, the nurses initial action will be first not to tamper with fresh surgery tubes and then call the primary health care provider for blood draining from the NG tube after the procedure (gastrectomy)
Answer:
because our solar-system's vantage point is inside one of the galaxy's spiral arms. When we observe the Milky Way, we usually are looking toward the center of the galaxy, about 25,000 light-years away.
Answer: Magma originates in the lower part of the Earth's crust and in the upper portion of the mantle. Most of the mantle and crust are solid. Magma that cools quickly forms one kind of igneous rock. When igneous rocks undergo weathering and erosion, they are broken into smaller pieces of sediment. Once the rock has been weakened and broken up by weathering it is ready for erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. Mechanical weathering physically breaks up rock. ... The sediment is dropped, or deposited, in landforms. Over time, sediment accumulates in oceans, lakes, and valleys, eventually building up in layers and weighing down the material underneath. This weight presses the sediment particles together, compacting them. Water passing through the spaces in between the particles helps to cement them together even more. Some examples of sedimentary rocks are limestone, sandstone, siltstone, shale, conglomerate, and breccia. Most sedimentary rocks contain either quartz or calcite. Way down inside the Earth, it very hot and there is a lot of pressure. It's so hot and there is so much pressure that rocks that get pushed deep into the Earth actually change. This process is called metamorphism. ... Some rocks get pushed down so far underground that they melt and become molten rock called magma. It's so hot and there is so much pressure that rocks that get pushed deep into the Earth actually change. ... Igneous rocks like granite can turn into gneiss (pronounced 'nice') and sedimentary rocks like limestone can change into marble when they are pushed down into the hot pressure-cooker inside the Earth.
Explanation: