Mitosis is a division of a single cell into two identical daughter cells. It consists of four phases: prophase, metaphase, anaphase and telophase and cytokinesis. During metaphase, sister chromatids join together in the middle of the cell, so that during anaphase they can separate from each other to the opposite sides of the cells where they will represent future "nucleus" of the daughter cells. However, is metaphase was skipped, sister chromatids would not join in the middle, and consequently, they would not separate in anaphase. One of the possible consequences is that mitosis will stop and the cell would not divide. On the other hand, it could lead to unequal distribution of chromatids, so one cell will get both copies of chromosomes and the other will lack in chromosomes, which is lethal in both situations.
There Is a phase in mitosis called G0, which occurs before the other stages. jn this stage, cells grow in order to become big enough go divide, meaning cells take the time to grow in order to divide at the same sizs.
Because when air molecules bounce off a surface that force is spread out over that surface.
Answer:
cholesterol
Explanation:
Atherosclerosis and several heart diseases are caused by the development of atherosclerotic plaques. There is thickening of the walls of the arteries and loss of elasticity. LDLs (low-density lipoproteins) transport cholesterol from the liver to body cells so that is can be used in processes like cell membrane repair and the production of steroid hormones, etc. However, the excess amounts of LDLs promote atherosclerosis as the excess of the cholesterol is deposited in the walls of certain arteries. The arteries are damaged, inflamed and become narrow due to deposition of cholesterol leading eventually to impaired circulation and heart disease.
Answer:
Sedimentary rocks are rocks that are formed by sediment accumulation, which are particles of various sizes that are transported by water, ice or wind, and are subjected to physical and chemical processes (diagenesis), which give rise to materials consolidated.
Explanation:
mentary rocks can form on the banks of rivers, at the bottom of ravines, valleys, lakes, seas, and at the mouths of rivers. They are disposed in layers or stratums.
There are external geological processes that act on pre-existing rocks, these agents weather them, transport and deposit them in different places depending on the transport (water, wind, ice). Similarly, different animal or plant organisms can contribute to the formation of sedimentary rocks (fossils). Sedimentary rocks can exist up to a depth of ten kilometers in the earth's crust. These rocks may appear loose or consolidated, that is, they have been joined to others by post-sedimentation processes, known as diagenesis.
The sedimentary rocks cover more than 75% of the earth's surface, forming a sedimentary cover that lies on igneous rocks and, to a lesser extent, on metamorphic ones.