Facts you need to know to pass the Living Environment Regents Exam Cellular biology 1. The ability of an organism to maintain internal stability is known as______________________. 2. ________________-the sum of all the chemical reactions that occur within the cells of an organism. 3. Organic molecules contain both________________ and ___________________. 4. Organelle- structures within a cell that carries out _____________ function. Review all. 5. Organelles -Cells- Tissues- Organs- Organ
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plant pigment into different colours using solvents and column chromatography. The hypothesis of this experiment is that this plant pigment from spinach will contain the chlorophyll pigment or may contain the others too. Chlorophyll: Chlorophyll a is the main component of the plant pigments. This is used for the most important process‚ Photosynthesis. Chlorophyll a makes up about 75% of the plant pigment. The other 25% is the chlorophyll b. Figure 1: Chlorophyll a (http://brsmblog.com/wp-content/uploads/2011/12/0-chlorophyll-a-1024x735
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use of pseudopodia. Gaseous exchange is through their body surfaces. Multicellular organisms on the other hand have their cells organized into complex tissues and organs and body processes like respiration and excretion occurs in this organs. Photosynthesis is the process in
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Process of Diffusion and its importance in living organisms Diffusion is the movement of molecules or ions down a concentration gradient i.e. from an area of high concentration to an area of low concentration. For a diffusion system to be efficient‚ it should have a large surface area so that high amount of substances can be exchanged at a time. It should also have a thin membrane and a continuous supply of substances‚ as a thin membrane means that the diffusion pathway would be short‚ and the continuous
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Describe the structure and function of each of the eukaryotic organelles. ”A eukaryotic cell is sectioned by internal membranes into different functioning categories called organelles. For example‚ the nucleus houses DNA‚ the genetic component that controls the cells activities. (Boundless. “Introduction” Boundless Biology). The Cytoplasm is the material between the cell membrane and the nucleus. It has a lot of responsibilities within the cell. It contains enzymes for breaking down waste and also
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Chapter 3 Cell Structure and Function Section 3.1: Cell Theory: Cells are the smallest building unit of living organisms that can carry out all processes required for life. Almost all cells are too small to see without the aid of a Microscope. Although glass lenses used to magnify images for hundreds of years‚ they were not enough to reveal individual cells. The invention of Compound microscope was in the late 1500s by the Dutch eyeglass maker Zacharias Janssen. In 1665‚ the English scientist
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Keeping conditions inside the body the same is called homeostasis. It’s not easy. Lots of things have to happen‚ e.g. energy transferred between body and environment‚ carbon dioxide is a waste product of respiration and has to be transported by the bloodstream to the lungs where it is breathed out‚ waste and waste products are filtered out of the blood and excreted in the urine. An incubator has a temperature sensor‚ a thermostat with a switch and a heater. Negative feedback happens when one factor
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Greek wards-auto means self and troph means nutrition. In this mode of nutrition‚ the organisms prepare their own food from simple raw materials like water‚ carbon dioxide and mineral salts in the presence of sunlight. Chlorophylls present in the chloroplast or green plants are the site of food production. Accordingly all green plants are the examples
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Cellular Respiration Project Objective Answers 1. The overall equation for Cellular Respiration is 6O2 + C6H12O6 6H2O + 6CO2 + energy. Overall‚ it is the reverse reaction of photosynthesis‚ but chemically‚ the steps involved are very different. All you have to do is just flip both sides of the equation of photosynthesis‚ and you have the opposite‚ which is the equation for cellular respiration. They are reversible chemical reactions‚ meaning that the products of one process are the exact reactants
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1. ATP is made up of ribose‚ adenine‚ and phosphate. It is also made in the mitochondria. ATP plays a very critical role for all organisms from the simplest to the most complex. ATP is like a natural fuel source with out it you wouldn’t be living. ATP enables you to move your muscles and they are building blocks for more complex molecules. Nutrient alone aren’t enough for the body and are of a low energy source but to activate all the nutrients to turn it into a high energy you need ATP. ATP powers
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