Answer the following question given this paragraph: Water potential is a measure of the potential energy in water. Plant physiologists are not interested in the energy in any one particular aqueous system, but are very interested in water movement between two systems. In practical terms, therefore, water potential is the difference in potential energy between a given water sample and pure water (at atmospheric pressure and ambient temperature). Water potential is denoted by the Greek letter (psi) and is expressed in units of pressure (pressure is a form of energy) called megapascals (MPa). The potential of pure water (wpure H2O) is, by convenience of definition, designated a value of zero (even though pure water contains plenty of potential energy, that energy is ignored). Water potential values for the water in a plant root, stem, or leaf are therefore expressed relative to wpure H2O. The water potential in plant solutions is influenced by solute concentration, pressure, gravity, and factors called matrix effects. Water potential can be broken down into its individual components using the following equation:. Q: What is the measure of water potential? Choices: - trials - fluctuations - spores - megapascals A:
megapascals
(Question)
Answer the following question given this paragraph: Solubility is the amount of solute that can dissolve in a given amount of solvent at a given temperature. In a solution, the solute is the substance that dissolves, and the solvent is the substance that does the dissolving. For a given solvent, some solutes have greater solubility than others. For example, sugar is much more soluble in water than is salt. But even sugar has an upper limit on how much can dissolve. In a half liter of 20 C water, the maximum amount is 1000 grams. If you add more sugar than this, the extra sugar won't dissolve. You can compare the solubility of sugar, salt, and some other solutes in the Table below . For a video about solubility, go to this URL: http://www. youtube. com/watch?v=IKimraU21ws . Q: What is the amount of solute that can dissolve in a given amount of solvent at a given temperature? Choices: - permeability - humidity - viscosity - solubility A:
(Answer)
solubility
Ques: Answer the following question given this paragraph: Placenta of a Placental Mammal (Human). The placenta allows the exchange of gases, nutrients, and other substances between the fetus and mother. Q: What mammalian structure allows the exchange of gases, nutrients, and other substances between the fetus and mother? Choices: - uterus - mitochondria - notochord - placenta A:
Ans: placenta
(Q).
Answer the following question given this paragraph: Osmosis is the transport of water through a semipermeable membrane from a region of high concentration to a region of low concentration. Osmosis is driven by the imbalance in water concentration. For example, water is more concentrated in your body than in Epsom salt. When you soak a swollen ankle in Epsom salt, the water moves out of your body into the lower-concentration region in the salt. Similarly, dialysis is the transport of any other molecule through a semipermeable membrane due to its concentration difference. Both osmosis and dialysis are used by the kidneys to cleanse the blood. Osmosis can create a substantial pressure. Consider what happens if osmosis continues for some time, as illustrated in Figure 12.23. Water moves by osmosis from the left into the region on the right, where it is less concentrated, causing the solution on the right to rise. This movement will continue until the pressure gh created by the extra height of fluid on the right is large enough to stop further osmosis. This pressure is called a back pressure. The back pressure. Q: Osmosis is driven by the imbalance of what? Choices: - precipitation - isolation - evaporation - water concentration A:
(A).
water concentration
Ques:Answer the following question given this paragraph: Meanders form because water erodes the outside of curves and deposits eroded material on the inside. Over time, the curves shift position. Q: What form because water erodes the outside of curves and deposits eroded material on the inside? Choices: - inlets - cascades - caverns - meanders A:

Ans:meanders
Ques:Answer the following question given this paragraph: Cartilage: There are three cartilage types: 1. hyaline cartilage 2. fibrocartilage (fibrous cartilage) 3. elastic cartilage Hyaline cartilage: most widespread cartilage type, in adults forms articular surfaces of long bones, rib tips, rings of trachea, and parts of skull. Mostly collagen, name refers to glassy appearance. In embryo, bones form first as hyaline cartilage, later ossifies. Found in tracheal rings. Few collagen fibers. Fibrous cartilage: have lots of collagen fibers. Found in intervertebral discs, pubic symphesis. Grades into dense tendon and ligament tissue. Elastic cartilage: springy and elastic. Found in internal support of external ear and in epiglottis, yellow when fresh. Chondrocites (cartilage cells) rely on diffusion for nutrients, as cartilage has no direct blood supply, and no enervation (nerves). Can be loaded with calcium salts. Q: Comprised mainly of collagen and associated with long bones and the skull, hyaline is the most widespread type of what? Choices: - enzymes - tissue - cytoplasm - collagen A:

Ans:
collagen