 Larger size means there are fewer predators and have a wide variety of prey.  Longer life.  Specialization of each cell makes multi- cellular organisms.

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Presentation transcript:

 Larger size means there are fewer predators and have a wide variety of prey.  Longer life.  Specialization of each cell makes multi- cellular organisms more efficient.

 Tissue: a group of similar cells that perform a common function. CellsTissues Cells work together to create tissues

 Organ: a collection of tissues that carry out a specialized function in the body. TissuesOrgans Tissues work together to create organs.

 Organ System: a group of organs that work together to perform body functions. Organs work together to create Organ Systems. Organs Organ Systems

CellOrganTissueOrgan System The Organization of Living Things

 Plants get food from photosynthesis.  Photosynthesis: the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food.

 There are two ways animal cells get food. Animal Cells get food by… Cellular Respiration Fermentation

 Cellular Respiration: the process by which cells use oxygen to produce energy from food.  Food is broken into carbon dioxide and water and energy is released.  Some of the energy is used to form adenosine triphosphate (ATP-remember it was in the organelle powerpoint).  ATP supplies energy that fuels cell activities.  C₂H₁₂O₆ + 6O₂ 6CO₂ + H₂O + energy (ATP)

 Cellular Respiration releases carbon dioxide and water which is used by plant cells to make glucose. During photosynthesis, oxygen is released.  Photosynthesis makes glucose and oxygen which is used by animal cells to make ATP. Cellular respiration releases carbon dioxide and water.

Cellular Respiration Light Energy Chloroplast from Plant Cell C₂H₁₂O₆ + O₂ Cellular respiration releases carbon dioxide and water which is used by plant cells to make glucose. During photosynthesis, oxygen is released. Mitochondria from Animal Cell ATP Photosynthesis CO₂ + H₂O Photosynthesis makes glucose and oxygen which is used in animal cells to make ATP. Cellular respiration releases carbon dioxide and water. Better view of this on page 388

 Fermentation: the breakdown of food without the use of oxygen.  Example: your muscles burning when you are running. Your muscles can’t get enough oxygen so fermentation produces lactic acid which makes your muscles burn.  Example: Yeast in bread. Yeast forms carbon dioxide during fermentation. The bubbles of CO₂ cause the dough to rise and leave small holes in the bread after it is baked.