AP Biology 2019 Free-Response Questions - AP Central.
Osmosis is a type of simple diffusion in which water molecules diffuse through a selectively permeable membrane from areas of high water concentration to areas of lower water concentration. (Note that the more particles there are dissolved in a solution, the less water there is in it, so osmosis is sometimes described as the diffusion of water from areas of low solute concentration to areas of.
In this video Paul Andersen defines water potential and explains how it can be calculated in a simple system. He explains how water can moved through osmosis and break down the two major parts of water potential (solute potential and pressure potential). He finishes the video with a sample calculation of solute potential.
Essays Related to AP Bio- characteristics of water. 1. The PEPCON Explosion. Following the 1986 Challenger disaster, PEPCON stopped shipping AP to NASA, but they continued to produce AP at an unchanged rate. This caused PEPCON to stockpile AP for 15 months straight, which resulted in over 4000 tons of AP being stored at the facility. The AP was stored in a variety of containers, most of AP at.
Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure and matrix effects such as capillary action (which is caused by surface tension).The concept of water potential has proved useful in understanding and.
Properties and uses of water. Water is essential to living organisms. The list below shows some of its properties and uses. Hydrogen bonds are formed between the oxygen of one water molecule and the hydrogen of another. As a result of this water molecules have an attraction for each other known as cohesion. Cohesion is responsible for surface tension which enables aquatic insects like pond.
In a general sense, the water potential is the tendency of water to diffuse from one area to another. Water potential is expressed in in bars, a metric unit of pressure equal to about 1 atmosphere and measured with a barometer. Consider a potato cell is placed in pure water. Initially the water potential outside the cell is 0 and is higher than the water potential inside the cell. Under these.
AP Biology Exam Information Sample Free-Response Questions %JSFDUJPOT Question 1 is a long free-response question that should require about 20 minutes each to answer. Questions 2 through 4 are short free-response questions that should require about 6 minutes each to answer. Read each question carefully and write your response. Answers must be written out. Outline form is not acceptable. It is.