Q: What type of matter often sinks into cracks between rocks? Read this paragraph and choose the correct option from the provided answers: Choices: - algae - vapor - energy - liquid A:
liquid

(Question)
Q: What is the measure of water potential? Read this paragraph and choose the correct option from the provided answers: 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:. Choices: - trials - fluctuations - spores - megapascals A:
(Answer)
megapascals

Ques: Q: All chemical changes involve a transfer of what? Read this paragraph and choose the correct option from the provided answers: All chemical changes involve a transfer of energy. When zinc reacts with hydrochloric acid, the test tube becomes very warm as energy is released during the reaction. Some other reactions absorb energy. While energy changes are a potential sign of a chemical reaction, care must be taken to ensure that a chemical reaction is indeed taking place. Physical changes also involve a transfer of energy. Melting of a solid absorbs energy, while the condensation of a gas releases energy. The only way to be certain that a chemical reaction has taken place is to test the composition of the substances after the change has taken place to see if they are different from the starting substances. Choices: - hydrogen - pressure - nitrogen - energy A:
Ans: energy

(Q).
Q: What class of oxygencontaining compounds is formed by the dehydration of alcohols? Read this paragraph and choose the correct option from the provided answers: Ethanol and resveratrol, a phenol, are representatives of two of the families of oxygencontaining compounds that we consider in this chapter. Two other classes, aldehydes and ketones, are formed by the oxidation of alcohols. Ethers, another class, are made by the dehydration of alcohols. Choices: - reagents - sugars - nethers - ethers A:
(A).
ethers

Ques:Q: During sexual reproduction, the macronucleus dissolves and is replaced by what? Read this paragraph and choose the correct option from the provided answers: Figure 23.16 The complex process of sexual reproduction in Paramecium creates eight daughter cells from two original cells. Each cell has a macronucleus and a micronucleus. During sexual reproduction, the macronucleus dissolves and is replaced by a micronucleus. (credit "micrograph": modification of work by Ian Sutton; scale-bar data from Matt Russell). Choices: - fluctuations - chromosomes - sporozoans - micronucleus A:

Ans:micronucleus

Q: In which direction does water travel? Read this paragraph and choose the correct option from the provided answers: After a heavy rain, you may find puddles of water standing in low spots. The same principle explains why water collects in ponds and lakes. Water travels downhill, so a depression in the ground fills with standing water. A pond is a small body of standing water. A lake is a large body of standing water. Most lakes have freshwater, but a few are salty. The Great Salt Lake in Utah is an example of a saltwater lake. Choices: - backwards - northwest - uphill - downhill A:
downhill