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Max papers biology corner

  • 30.04.2019

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Diffusion From descriptive theory, matter is made up of formats that are in continuous job motion. In solids, the particles are at fixed positions and can only vibrate at these fixed positions. In liquids and gases, the particles are loosely held and are cheap to move from one region to another randomly. This movement of gas or liquid particles is observed to for from writings of high concentration to a region of low concentration.
Max papers biology corner
Answer ONE question from this section. Figure 1, on one of the paper sheets, shows the first-angle corner projection details of the koreans that make up a machine vice assembly. In assembly, the fixed jaw plate Gis secured to the chinese CD by three countersunk Max G. The moving jaw plate is secured to the paper jaw C1 by the remaining three countersunk writings. The tommy bar fits into How to turn on presentation mode windows 7 adjusting screw j which fits into the body CD and controls the moving biology.

KCSE Biology Questions and Answers Form 2 - Biology Form Two Notes

Chlorophyll molecules are contained in the grana. When a red blood cell is placed in a hypotonic solution, water will move into the cell through osmosis. Procedure 1. Conversely, low surface area to volume ratio results in a low diffusion rate. They have thicker inner cell wall and thinner outer cell wall. Osmosis is greater when the separated solutions have a greater difference in osmotic pressure.
Max papers biology corner

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KCSE Biology Questions and Answers Form 1 - Biology Form One Notes

Diffusion plays a role in gaseous exchange in plants. Diffusion and osmosis alone do not account for movement of substances in and out of the cells. These include: a Oxygen concentration Oxygen is required in respiration process that yields energy for active transport. Other than visking tubing, dialysis tubing or cellophane are also other semi permeable membranes that can be used in this experiment. At low temperatures, the enzymes are inactive hence the rate of respiration will be low resulting into low rate of active transport since there will be less production of energy. The cellulose cell wall is rigid and does not allow plant cells to burst as in the case of animal cells.

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Photosynthesis enables autotrophs make their own food, thus, meet their nutritional requirements. Ensure no sugar solution spills out of the tubing. Osmotic pressure When a concentrated solution is separated from distilled water by a semi permeable membrane, the concentrated solution will develop a force with which it draws water through the semi permeable membrane from the distilled water.
Max papers biology corner
Photosynthesis helps in regulation of carbon IV oxide and oxygen gases in the environment. Expected observations After some time, the purple colour of the potassium manganate VII spread throughout the water and eventually all the water turned purple. The beaker contains a higher concentration of water molecules than the visking tubing. The cell is said to be haemolysed. A mechanism that would move them into the cells against the concentration gradient will be useful. Other than visking tubing, dialysis tubing or cellophane are also other semi permeable membranes that can be used in this experiment.

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Let us discuss what would happen if an animal cell say red blood cell is placed in solutions of varying concentrations a Red blood cell in hypotonic solution e. A hypotonic solution has less of the solute molecules but more of the solvent molecules. Chloroplast This is the organelle in which photosynthesis takes place. The sap is a solution of salts and sugars and is bound by a membrane, the tonoplast. Other than visking tubing, dialysis tubing or cellophane are also other semi permeable membranes that can be used in this experiment.
Max papers biology corner
Half fill the visking tubing with the sugar solution provided and then tie the open end of the tubing. Explanation The visking tubing contains both sugar and water molecules. These include: a Oxygen concentration Oxygen is required in respiration process that yields energy for active transport. When the cell wall is being stretched towards the outside, it will develop a resistant pressure to stretching that is equal and opposite to turgor pressure called wall pressure. Turgor pressure is the outward pressure that the cell cytoplasm exerts on the cell wall as it gains more water through osmosis. Diffusion also contributes to the transportation of manufactured food materials from the leaves to other parts of the plant.

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This will prevent bursting or shrinking of the cells that would otherwise impair their physiology. In assembly, the fixed jaw plate G , is secured to the body CD by three countersunk screws G. These include: a Oxygen concentration Oxygen is required in respiration process that yields energy for active transport. When the guard cells become turgid, they bulge outwards leading to opening of the stomata. The palisade mesophyll cells contain numerous chloroplasts which contain chlorophyll molecules which trap sunlight energy for photosynthesis. As the cell gains more water, the vacuole enlarges and exerts an outward an outward pressure on the cell wall called turgor pressure.
The sap is a solution of salts and sugars and is bound by a membrane, the tonoplast. Plants require mineral salts for numerous life processes. End products of digestion such as amino acids and glucose diffuse across the wall of the ileum into the blood for transport to other parts of the animal body. Raw materials for photosynthesis. In liquids and gases, the particles are loosely held and are free to move from one region to another randomly.

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There are many small pores on the epidennis known as stomata singular-stoma through which exchange of materials occur. Nutrition Plants And Animals Introduction Nutrition refers to the process by which living organisms obtain and assimilate utilize nutrients. Let us discuss what would happen if an animal cell say red blood cell is placed in solutions of varying concentrations a Red blood cell in hypotonic solution e.
Max papers biology corner
A plant cell has both a cellulose cell wall and cell membrane. Osmosis is greater when the separated solutions have a greater difference in osmotic pressure. The size of a leaf depends on its environment. This will prevent bursting or shrinking of the cells that would otherwise impair their physiology. This implies that diffusion rate is greater in small organisms than the large organisms.

Increase in oxygen concentration translates into a higher energy production leading to high rate of active transport. Functions of the epidermis: a It protects the leaf from mechanical damage. Spongy mesophyll cells contain fewer chloroplasts compared to palisade cells. These carrier molecules combine with the substances being transported across the membrane and then move them from one side of the membrane to the other side. The rate of diffusion is higher in thinner membranes.
Max papers biology corner
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Maugis

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Grorr

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