In the mid nineteen century a priest named Gregory Mendel discovery the heredity. Heredity is the passing of physical characteristics is called trait. Mendel discoveries form the foundation of generals, the scientific study of heredity.
Mendel´s experiments:
Mendel crossed plants that had different traits and developed a method by which is cross pollinated or “crossed” pea plants. In the experiments they use the fertilization. Fertilization is the process to form when egg and sperm. He started his experiments with pea plants. A purebred organism is the offspring of many of many generations that have the same trait.
Mendel reached several conclusions on the basis of his experimental use.
The factors that consist each trait exist in pairs. The female parent contributes the other factor. Today scientists use the word gene for the factor that controls a trait. Alleles are the different forms of alleles are dominant, while other alleles are recessive. A recessive alleles will only show up if the organism does not have the dominant allele.
The importance of Mendel´s discovery was not recognized during his lifetime. Then in 1900 three different scientists rediscovered Mendel´s work. These scientists quickly recognized the importance of Mendel´s ideas.
By Monique Velasco Saldaña
sábado, 10 de octubre de 2009
lunes, 5 de octubre de 2009
The Cell on its Environment (Page 80-85)
The Cell on its Environment (Page 80-85)
1.All cells are surrounded by a cell membrane that separates the cell from the outside environment.
2.The cell membrane is selectively permeable, wich means that some substances can pass through the membrane, while others cannot.
3.Cell must let in needed materials such as oxygen and food molecules. In contrast, waste materials must move out the cell, all must pass through cell membrane.
Substances that can move into and of a cell do by one of these materials:
Diffusion: Is the method by wich small molecules move across the cell membrane. Is the process by wich molecules move from an area of higher concentration to an area of lower concentration.
Osmosis: Is the diffusion on water molecules through a selectively permeable membrane. Because cell can´t function properly without adequate water, many of the cell process depends on osmosis.
Active and Passive Transport: Is the movement of materials through a cell membrane using cellular energy. Active transport requires the cell to use its own energy, while passive transport does not.
By Mauricio Pérez Chávez
M13
1.All cells are surrounded by a cell membrane that separates the cell from the outside environment.
2.The cell membrane is selectively permeable, wich means that some substances can pass through the membrane, while others cannot.
3.Cell must let in needed materials such as oxygen and food molecules. In contrast, waste materials must move out the cell, all must pass through cell membrane.
Substances that can move into and of a cell do by one of these materials:
Diffusion: Is the method by wich small molecules move across the cell membrane. Is the process by wich molecules move from an area of higher concentration to an area of lower concentration.
Osmosis: Is the diffusion on water molecules through a selectively permeable membrane. Because cell can´t function properly without adequate water, many of the cell process depends on osmosis.
Active and Passive Transport: Is the movement of materials through a cell membrane using cellular energy. Active transport requires the cell to use its own energy, while passive transport does not.
By Mauricio Pérez Chávez
M13
The Cell on its Environment (Page 80-85)
The Cell on its Environment (Page 80-85)
1.All cells are surrounded by a cell membrane that separates the cell from the outside environment.
2.The cell membrane is selectively permeable, wich means that some substances can pass through the membrane, while others cannot.
3.Cell must let in needed materials such as oxygen and food molecules. In contrast, waste materials must move out the cell, all must pass through cell membrane.
Substances that can move into and of a cell do by one of these materials:
Diffusion: Is the method by wich small molecules move across the cell membrane. Is the process by wich molecules move from an area of higher concentration to an area of lower concentration.
Osmosis: Is the diffusion on water molecules through a selectively permeable membrane. Because cell can´t function properly without adequate water, many of the cell process depends on osmosis.
Active and Passive Transport: Is the movement of materials through a cell membrane using cellular energy. Active transport requires the cell to use its own energy, while passive transport does not.
By Mauricio Pérez Chávez
M13
1.All cells are surrounded by a cell membrane that separates the cell from the outside environment.
2.The cell membrane is selectively permeable, wich means that some substances can pass through the membrane, while others cannot.
3.Cell must let in needed materials such as oxygen and food molecules. In contrast, waste materials must move out the cell, all must pass through cell membrane.
Substances that can move into and of a cell do by one of these materials:
Diffusion: Is the method by wich small molecules move across the cell membrane. Is the process by wich molecules move from an area of higher concentration to an area of lower concentration.
Osmosis: Is the diffusion on water molecules through a selectively permeable membrane. Because cell can´t function properly without adequate water, many of the cell process depends on osmosis.
Active and Passive Transport: Is the movement of materials through a cell membrane using cellular energy. Active transport requires the cell to use its own energy, while passive transport does not.
By Mauricio Pérez Chávez
M13
Key Terms (Page 80)
Selectively Permeable: A property of cell membranes that allows some substances to pass trough, while others cannot.
Diffusion: The process by wich molecules come from an area of higher concentration to an area of lower concentration.
Osmosis: The diffusion of water molecules through a selectively permeable membrane.
Passive Transport: The movement of materials through a cell membrane without using cells energy.
Active Transport: The movement of materials through a cell membrane using energy.
Mauricio Pérez Chávez
M13
Diffusion: The process by wich molecules come from an area of higher concentration to an area of lower concentration.
Osmosis: The diffusion of water molecules through a selectively permeable membrane.
Passive Transport: The movement of materials through a cell membrane without using cells energy.
Active Transport: The movement of materials through a cell membrane using energy.
Mauricio Pérez Chávez
M13
domingo, 4 de octubre de 2009
key terms
PHOTOSYNTHESIS: the process in which some organisms use water along with sunlight and carbon dioxide to make their own food.
AUTOTROPH: invertebrate that has an external skeleton a segment body and jointed appendages.
HETEROTROPH: Is an organism that cannot make its own food.
PIGMENT: a colored chemical that absorb Light.
CHLOROPHYLL: a green pigment found in the chloroplasts of plants algae and some bacteria.
STOMATO: small openings on a leaf through which oxygen and carbon dioxide can move.
Raquel Gastelum Kikushima M1108
AUTOTROPH: invertebrate that has an external skeleton a segment body and jointed appendages.
HETEROTROPH: Is an organism that cannot make its own food.
PIGMENT: a colored chemical that absorb Light.
CHLOROPHYLL: a green pigment found in the chloroplasts of plants algae and some bacteria.
STOMATO: small openings on a leaf through which oxygen and carbon dioxide can move.
Raquel Gastelum Kikushima M1108
KEY TERMS
PHOTOSYNTHESIS: the process in which some organisms use water along with sunlight and carbon dioxide to make their own food.
AUTOTROPH: invertebrate that has an external skeleton a segment body and jointed appendages.
HETEROTROPH: Is an organism that cannot make its own food.
PIGMENT: a colored chemical that absorb Light.
CHLOROPHYLL: a green pigment found in the chloroplasts of plants algae and some bacteria.
STOMATO: small openings on a leaf through which oxygen and carbon dioxide can move.
Raquel Gastelum Kikushima
M1108
Cellular Respiration
Cellular Respiration:
Is the process by which cells obtain energy from glucose.
Stage #1:
In the cytoplasm glucose is broken down into smaller molecules
Stage #2:
In the mitochondria, the smaller molecules combine with oxygen to produce water and carbon dioxide
Respiration
“Breathing” this is the action to moving air in and out o your livings. Breaking brings oxygen, witch really necessary of the cellular respiration in your lungs
Photosynthesis vs Cellular respiration
In the photosynthesis, Carbon dioxide and water are used to produce sugar and oxygen; in the cellular repiration Sugar and oxygen are used to produce carbon dioxide and water.
Anaerobic respiration.
Some cells are able to obtain energy from food without using oxygen this cells obtend their energy though fermentation.The fermentation provides energy from cells without using oxygen.
Types of fermentation:
#1 Alcoholic fermentation: Occurs when yeast and some other single-called organisms break down sugars. This process is some times called alcoholic fermentation, because some one of the products is the alcohol. The others products are carbon dioxide and smalls amount of energy.
#2 Lactic acid fermentation: This take place in your muscle when the cells used up the oxygen faster that it Could be replaced, because your cells lacked oxygen, fermentations occurred and supplied the oxygen. When lactic acid builds up you feed a painful sensation in your muscles.
By Jimena Santana González M1127 and Andrea Ramírez Vernis M1227
Is the process by which cells obtain energy from glucose.
Stage #1:
In the cytoplasm glucose is broken down into smaller molecules
Stage #2:
In the mitochondria, the smaller molecules combine with oxygen to produce water and carbon dioxide
Respiration
“Breathing” this is the action to moving air in and out o your livings. Breaking brings oxygen, witch really necessary of the cellular respiration in your lungs
Photosynthesis vs Cellular respiration
In the photosynthesis, Carbon dioxide and water are used to produce sugar and oxygen; in the cellular repiration Sugar and oxygen are used to produce carbon dioxide and water.
Anaerobic respiration.
Some cells are able to obtain energy from food without using oxygen this cells obtend their energy though fermentation.The fermentation provides energy from cells without using oxygen.
Types of fermentation:
#1 Alcoholic fermentation: Occurs when yeast and some other single-called organisms break down sugars. This process is some times called alcoholic fermentation, because some one of the products is the alcohol. The others products are carbon dioxide and smalls amount of energy.
#2 Lactic acid fermentation: This take place in your muscle when the cells used up the oxygen faster that it Could be replaced, because your cells lacked oxygen, fermentations occurred and supplied the oxygen. When lactic acid builds up you feed a painful sensation in your muscles.
By Jimena Santana González M1127 and Andrea Ramírez Vernis M1227
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