Q: What play several important roles in the human body? Read this paragraph and choose the correct option from the provided answers: Lipids play several important roles in the body. Triglycerides are stored in fat cells until the body needs to break them down for chemical energy. These stored triglycerides also help insulate the body against extreme temperatures and cushion organs against physical jostling. Phospholipids and cholesterol are important constituents of the cell membrane. These compounds provide structural integrity to the cell wall, since they are not water-soluble. Other steroids are used as chemical messengers in the body, and the fat-soluble vitamins serve a variety of other functions. Choices: - cells - tissues - organs - lipids A:
lipids

Q: In vascular plants, do primary roots grow downward or to the side? Read this paragraph and choose the correct option from the provided answers: Roots are important organs in all vascular plants. Most vascular plants have two types of roots: primary roots that grow downward and secondary roots that branch out to the side. Together, all the roots of a plant make up a root system . Choices: - to the side - neither - it depends - downward A:
downward

Q: Q: What can be thought of as the fundamental unit of life? Read this paragraph and choose the correct option from the provided answers: It could easily be said that a cell is the fundamental unit of life, the smallest unit capable of life or the structural and functional unit necessary for life. But whatever it is, a cell is necessary for life. The Cell Biology chapter will discuss some of the fundamental properties of the cell, with lessons that include the cell structure, transport in and out of the cell, energy metabolism, and cell division and reproduction. Choices: - ion - atom - electron - cell A:
A: cell

Question: Q: What is the diffusion of water through a semipermeable membrane according to the concentration gradient of water across the membrane Read this paragraph and choose the correct option from the provided answers: Osmosis Osmosis is the diffusion of water through a semipermeable membrane according to the concentration gradient of water across the membrane. Whereas diffusion transports material across membranes and within cells, osmosis transports only water across a membrane and the membrane limits the diffusion of solutes in the water. Osmosis is a special case of diffusion. Water, like other substances, moves from an area of higher concentration to one of lower concentration. Imagine a beaker with a semipermeable membrane, separating the two sides or halves (Figure 3.21). On both sides of the membrane, the water level is the same, but there are different concentrations on each side of a dissolved substance, or solute, that cannot cross the membrane. If the volume of the water is the same, but the concentrations of solute are different, then there are also different concentrations of water, the solvent, on either side of the membrane. Choices: - nutrients - mirrors - Gravity - osmosis A:
Answer: osmosis

*Question*
Q: Electrons flow through the electrolyte from the ________ to __________ electrode. Read this paragraph and choose the correct option from the provided answers: Both dry and wet cells work the same basic way. The electrodes react chemically with the electrolyte, causing one electrode to give up electrons and the other electrode to accept electrons. In the case of zinc and carbon electrodes, the zinc electrode attracts electrons and becomes negatively charged, while the carbon electrode gives up electrons and becomes positively charged. Electrons flow through the electrolyte from the negative to positive electrode. If wires are used to connect the two electrodes at their terminal ends, electric current will flow through the wires and can be used to power a light bulb or other electric device. Choices: - neutral; negative - negative; neutral - positive; negative - negative; positive A:
**Answer**
negative; positive

Q: Q: What are the attractive forces that occur between polar molecules called? Read this paragraph and choose the correct option from the provided answers: Dipole-dipole forces are the attractive forces that occur between polar molecules. A molecule of hydrogen chloride has a partially positive hydrogen atom and a partially negative chlorine atom. In a collection of many hydrogen chloride molecules, they will align themselves so that the oppositely charged regions of neighboring molecules are near each other. Choices: - induced-dipole forces - particle - dipole forces - ion-dipole forces - dipole-dipole forces A:
A: dipole-dipole forces