Q: Answer the following question given this paragraph: hydrophilic heads are directed outward, in contact with the water. Each micelle may contain thousands of lipid molecules. Polar lipids may also form a monolayer, a layer one molecule thick on the surface of the water. The polar heads face into water, and the nonpolar tails stick up into the air. Bilayers are double layers of lipids arranged so that the hydrophobic tails are sandwiched between an inner surface and an outer surface consisting of hydrophilic heads. The hydrophilic heads are in contact with water on either side of the bilayer, whereas the tails, sequestered inside the bilayer, are prevented from having contact with the water. Bilayers like this make up every cell membrane (Figure 17.6 "Schematic Diagram of a Cell Membrane"). Figure 17.5 Spontaneously Formed Polar Lipid Structures in Water: Monolayer, Micelle, and Bilayer. Q: When something is described as "hydrophilic", you can determine something about how it interacts with what? A:

OPTIONS:
- hydrogen
- air
- iron
- water

A: water

input: OPTIONS:
- it is filtered
- it does not exist
- it is destroyed
- it is recycled Now, answer this question: Answer the following question given this paragraph: Living things need nonliving matter as well as energy. What do you think matter is used for? It's used to build bodies. It's also needed to carry out the processes of life. Any nonliving matter that living things need is called a nutrient . Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems. In the figure below, you can see how ( Figure below ). Q: Unlike energy, what happens to matter in ecosystems? A:
A:
output: it is recycled

Answer the following question given this paragraph: Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: a. the temperature is close to 37C b. the atmosphere does not contain oxygen c. sugar is provided to the cells d. light is provided to the cells. Q: What kind of anaerobe is yeast? A:

OPTIONS:
- mutualistic
- obligate
- aerobic
- facultative

Answer: facultative

Problem: OPTIONS:
- impetus
- magnetism
- flow
- inertia
Q: Answer the following question given this paragraph: 4.2 Newton's First Law of Motion: Inertia Newton's first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion. Inertia is related to an object's mass. Mass is the quantity of matter in a substance. Q: What is the tendency of an object to remain at rest or remain in motion called? A:
Answer: inertia

Problem:OPTIONS:
- sunlight rays
- plasma rays
- ultraviolet rays
- gamma rays

Answer the following question given this paragraph: Gamma rays are electromagnetic waves that carry photons of energy called gamma particles. They are the most energetic of all electromagnetic waves. Q: Which electromagnetic waves are the most energetic of all electromagnetic waves? A:
****
A: gamma rays

Problem:OPTIONS:
- non-organic molecules
- typical molecules
- oxygen molecules
- organic molecules

Answer the following question given this paragraph: Not all hydrocarbons are straight chains. Many hydrocarbons have branches of C atoms attached to a chain. These branched alkanes are isomers of straight-chain alkanes having the same number of C atoms. However, they are different compounds with different physical and chemical properties. As such, they need different names. How do we name branched hydrocarbons? There are a series of rules for naming branched alkanes (and, ultimately, for all organic compounds). These rules make up the system of nomenclature for naming organic molecules. Worldwide, the International Union of Pure and Applied Chemistry (IUPAC) has developed the system of nomenclature for organic compounds. So these rules are sometimes called the IUPAC rules of nomenclature. By learning and applying these rules, you can name any organic compound when given its structure or determine the unique structure of a molecule from its name. You have already learned the basics of nomenclaturethe names of the first 10 normal hydrocarbons. Here, we will add some steps to the procedure so you can name branched hydrocarbons. First, given the structure of an alkane, identify the longest continuous chain of C atoms. Note that the longest chain may not be drawn in a straight line. The longest chain determines the parent name of the hydrocarbon. For example, in the molecule. Q: There are a series of rules for naming branched alkanes (and, ultimately, for all organic compounds). these rules make up the system of nomenclature for naming what? A:
****
A:
organic molecules