input: OPTIONS:
- organism acids
- protein acids
- bases
- amino acids Now, answer this question: Answer the following question given this paragraph: Introduction Since the rediscovery of Mendel's work in 1900, the definition of the gene has progressed from an abstract unit of heredity to a tangible molecular entity capable of replication, expression, and mutation (Figure 15.1). Genes are composed of DNA and are linearly arranged on chromosomes. Genes specify the sequences of amino acids, which are the building blocks of proteins. In turn, proteins are responsible for orchestrating nearly every function of the cell. Both genes and the proteins they encode are absolutely essential to life as we know it. Q: What are known as the building blocks of proteins? A:
A:
output: amino acids

Answer the following question given this paragraph: At the top of the troposphere is a thin layer of air called the tropopause. You can see it in Figure above . This layer acts as a barrier. It prevents cool air in the troposphere from mixing with warm air in the stratosphere. Q: What thin layer of air acts as a barrier to prevent cool air from mixing with warm air in the stratosphere? A:

OPTIONS:
- methosphere
- endosphere
- liposphere
- tropopause

Answer: tropopause

Problem: OPTIONS:
- fixation fractions
- mesh fractions
- atom fractions
- mole fractions
Q: Answer the following question given this paragraph: There are several different ways to quantitatively describe the concentration of a solution. For example, molarity was introduced in as a useful way to describe solution concentrations for reactions that are carried out in solution. Mole fractions, introduced in , are used not only to describe gas concentrations but also to determine the vapor pressures of mixtures of similar liquids. Example 4 reviews the methods for calculating the molarity and mole fraction of a solution when the masses of its components are known. Q: What is used to describe gas concentrations of a solution? A:
Answer: mole fractions

Problem:OPTIONS:
- appendix
- larynx
- spleen
- the stomach

Answer the following question given this paragraph: The stomach is a sac-like organ at the end of the esophagus. It has thick muscular walls that contract and relax to squeeze and mix food. This helps break the food into smaller pieces. It also helps mix the food with enzymes and other secretions in the stomach. For example, the stomach secretes the enzyme pepsin, which helps digest proteins. Q: What is a sac-like organ at the end of the esophagus? A:
****
A: the stomach

Answer the following question given this paragraph: A balanced chemical equation provides a great deal of information in a very succinct format. Chemical formulas provide the identities of the reactants and products involved in the chemical change, allowing classification of the reaction. Coefficients provide the relative numbers of these chemical species, allowing a quantitative assessment of the relationships between the amounts of substances consumed and produced by the reaction. These quantitative relationships are known as the reaction's stoichiometry, a term derived from the Greek words stoicheion (meaning "element") and metron (meaning "measure"). In this module, the use of balanced chemical equations for various stoichiometric applications is explored. The general approach to using stoichiometric relationships is similar in concept to the way people go about many common activities. Food preparation, for example, offers an appropriate comparison. A recipe for making eight pancakes calls for 1 cup pancake mix, 3 cup milk, and one egg. The "equation" representing the preparation of 4 pancakes per this recipe is 1 cup mix + 3 cup milk + 1 egg 8 pancakes 4 If two dozen pancakes are needed for a big family breakfast, the ingredient amounts must be increased proportionally according to the amounts given in the recipe. For example, the number of eggs required to make 24 pancakes is 24 pancakes . Q: What provides the identities of the reactants and products involved in the chemical change? A:
OPTIONS:
- electron shells
- genome sequence
- atomic numbers
- chemical formulas
chemical formulas

Answer the following question given this paragraph: Scientists have learned a lot about the ocean floor. For example, they know that Earth's tallest mountains and deepest canyons are on the ocean floor. The major features on the ocean floor are described below. They are also shown in Figure below . Q: Surprisingly, where would you find the earth's tallest mountains and deepest canyons? A:
OPTIONS:
- Tibet
- rain forests
- taiga
- ocean floor

Answer:
ocean floor