roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development of an organism? Cell division is needed
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| | |2 |(a) |During the favourable season more secondary xylem cells are formed and they are larger with thin|(3) | | | |wall (1) / larger lumen. | | | | |In the unfavourable season‚ less secondary xylem cells are formed and they are smaller with | | | | |thick wall (1) / smaller lumen.
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EXECUTIVE SUMMARY This case shows us that apart from transaction‚ translation and economic exposure to currency risk‚ firms also have the very real strategic impact on their competitive position from competitive exposure. Apart from GM’s exposure to the yen which is reflected in their financial statements‚ their competitive position vis-à-vis Japanese manufacturers is affected by a potentially declining yen. This is because a declining yen reduces the Japanese manufacturers’ $ cost‚ enabling
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State of the art on Bio-cutting fluids in Machining Submitted by: Abstract The increasing attention to the environmental and health impacts of industrial activities by governmental regulations and by the growing awareness level in the society is forcing industrialists to reduce the use of mineral oil-based metalworking fluids as cutting fluid. Cutting fluids have been used extensively in metal cutting operations for the last 200 years. In the beginning‚ cutting fluids consisted of simple
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the blood. 8. The filtration membrane consists of fenestrated capillary endothelium‚ porous basementmembrane‚ and the photocyte (which contain filtration slits). This filtration membrane permits (large or small) molecules to be filtered. 9. Proximal tubule: The simple cuboidal cells of the proximal tubule are called brush border cells because they contain numerous microvilli. The microvilli increase the surface area for reabsorption. The proximal tubule cells are highly permeable to water
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Planning Exercise Aim To investigate the effect of phosphate on cell division in root tips. Background knowledge Phosphate ions (macronutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide‚ mitosis has to occur. Phosphate is needed for production of ATP which provides energy for mitosis to occur. DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base‚ pentose sugar and phosphate group
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Lab activity 1: Effect of temperature‚ concentration‚ and pressure on equilibrium Introduction Our ongoing discussion has been on systems at dynamic equilibrium: for a reversible reaction‚ the rate of the forward reaction is equal to the rate of the reverse reaction. What happens if equilibrium is disturbed? In this lab activity‚ we are going to examine the effect of changing reaction conditions on the position of equilibrium. Part I: Effect of temperature We will consider the equilibrium
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is the movement of water molecules from high concentration to low concentration through semipermeable membranes‚ caused by the difference in concentrations on the two sides of a membrane (Rbowen‚ L.). It occurs in both animals and plants cells. In human bodies‚ the process of osmosis is primarily found in the kidneys‚ in the glomerulus. In plants‚ osmosis is carried out everywhere within the cells of the plant (World Book‚ 1997). This can be shown by an experiment with potato and glucose/salt solution
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Familiarity Bias: The Potent Cognitive Bias The great oracle Wiki says Familiarity bias is a “rule of thumb” that people like you and I use when forming a judgement‚ decisions or beliefs – Sounds all highbrow and impressive but leaves you scratching your head‚ wondering at the meaning‚ doesn’t it? To make understanding easier‚ let’s begin with an example; You are working in a corporate office for years. You are stagnating in the job. You know that you can find a better job with your experience
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Dark Tech: The Effect of the Cell Phone on Health Today’s technologies are advancing at such an astonishing rate. This can make it difficult for even the most avid “techie” to keep pace. Technology is that wonderful thing that brings comfort and convenience to our lives. But‚ with that comfort and convenience‚ there often comes a price; and the technology of the cell phone proves no exception. Arguably‚ as a communication tool‚ the cell phone has no equal in how it has changed and affected
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