Explore some properties of water with the amoeba sisters. This course is designed to prepare you for the ap biology exam, covering all of the topics outlined in the official test materials provided by the college board. Background cells and organisms must exchange matter with the environment to grow, reproduce. Cohesion, adhesion, and surface tension of water and how they relate to hydrogen bonding. Get free, curated resources for this textbook here. Biology is brought to you with support from the amgen foundation.
Cohesion, together with adhesion, results in capillary action that is essential especially in plants. Cohesion cohesion is an intermolecular attraction between like molecules, and is useful in describing why certain liquids such as water have peculiar properties like surface tension which create a skin like barrier between the air and the water. Course summary this ap biology textbook replacement course covers all of the topics in a standard ap biology textbook. Cohesion is close, as cohesion describes the ability. Cohesion gives rise to surface tension, the capacity of a substance to withstand rupture when placed under. The plants use capillary action to draw water upwards, i. Cohesion and surface tension keep the water molecules intact and the item floating on the top.
A strong adhesive force tends the liquid to spread. Cohesion and adhesion of water article khan academy. The highestrated books include comprehensive coverage of the course material, excellent practice questions, and helpful testtaking and studyplanning tips for students. Water is a polar molecule, and thus can adhere to different surfaces.
If you are looking to discover more about biology and go into depth beyond. Cohesion definition is the act or state of sticking together tightly. Ap biologythe nature of molecules wikibooks, open books. Box 2500 lebanon, in 46052 18009220579 titles audesirk, audesirk, and byers, biology. Cohesion is when hydrogen bonds hold molecules together. Ap biology cohesion, adhesion, surface tension, and. Heres the truth on which ap biology study guides will help you score a 5. Difference between adhesion and cohesion key differences. Read the section on solute concentrations carefully, and show the calculations here for preparing a 1molar solution of sucrose.
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