Answer the following question given this paragraph: Q: How many chambers does the stomach of a ruminant have? Choices: - 5 - 3 - 1 - 4 A:
4
(Question)
Answer the following question given this paragraph: Q: How long are microfilaments? Choices: - 9 nm - 4 nm - 7 m - 7 nm A:
(Answer)
7 nm
Ques: Answer the following question given this paragraph: Often, a worker will need to change the concentration of a solution by changing the amount of solvent. Dilution is the addition of solvent, which decreases the concentration of the solute in the solution. Concentration is the removal of solvent, which increases the concentration of the solute in the solution. (Do not confuse the two uses of the word concentration here!) In both dilution and concentration, the amount of solute stays the same. This gives us a way to calculate what the new solution volume must be for the desired concentration of solute. From the definition of molarity,. Q: Concentration is the removal of solvent, which increases the concentration of what? Choices: - vapor - sodium - Water - solute A:
Ans: solute
(Q).
Answer the following question given this paragraph: 2.2 Water Water has many properties that are critical to maintaining life. It is polar, allowing for the formation of hydrogen bonds, which allow ions and other polar molecules to dissolve in water. Therefore, water is an excellent solvent. The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances. As the temperature rises, the hydrogen bonds between water continually break and reform, allowing for the overall temperature to remain stable, although increased energy is added to the system. Water's cohesive forces allow for the property of surface tension. All of these unique properties of water are important in the chemistry of living organisms. The pH of a solution is a measure of the concentration of hydrogen ions in the solution. A solution with a high number of hydrogen ions is acidic and has a low pH value. A solution with a high number of hydroxide ions is basic and has a high pH value. The pH scale ranges from 0 to 14, with a pH of 7 being neutral. Buffers are solutions that moderate pH changes when an acid or base is added to the buffer system. Buffers are important in biological systems because of their ability to maintain constant pH conditions. Q: An excellent solvent that holds heat well and allows hydrogen bonds, what substance has many properties critical to life? Choices: - liquid - blood - plasma - water A:
(A).
water
Ques:Answer the following question given this paragraph: 12.7 Molecular Transport Phenomena: Diffusion, Osmosis, and Related Processes Diffusion There is something fishy about the ice cube from your freezerhow did it pick up those food odors? How does soaking a sprained ankle in Epsom salt reduce swelling? The answer to these questions are related to atomic and molecular transport phenomenaanother mode of fluid motion. Atoms and molecules are in constant motion at any temperature. In fluids they move about randomly even in the absence of macroscopic flow. This motion is called a random walk and is illustrated in Figure 12.20. Diffusion is the movement of substances due to random thermal molecular motion. Fluids, like fish fumes or odors entering ice cubes, can even diffuse through solids. Diffusion is a slow process over macroscopic distances. The densities of common materials are great enough that molecules cannot travel very far before having a collision that can scatter them in any direction, including straight backward. It can be shown that the average distance x rms that a molecule travels is proportional to the square root of time:. Q: What is the term for the movement of substances due to random thermal molecular motion? Choices: - Transfusion - convection - condensation - diffusion A:

Ans:diffusion
Answer the following question given this paragraph: Gymnosperms have seeds, but they do not produce fruit. Instead, the seeds of gymnosperms are usually found in cones. Q: Where are the seeds in gymnosperms found? Choices: - in leaves - in folds - in roots - in cones A:
in cones