Answer the following question given this paragraph: The cell membrane consists of two adjacent layers of phospholipids. The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.3). Because the phosphate groups are polar and hydrophilic, they are attracted to water in the intracellular fluid. Intracellular fluid (ICF) is the fluid interior of the cell. The phosphate groups are also attracted to the extracellular fluid. Extracellular fluid (ECF) is the fluid environment outside the enclosure of the cell membrane. Interstitial fluid (IF) is the term given to extracellular fluid not contained within blood vessels. Because the lipid tails are hydrophobic, they meet in the inner region of the membrane, excluding watery intracellular and extracellular fluid from this space. The cell membrane has many proteins, as well as other lipids (such as cholesterol), that are associated with the phospholipid bilayer. An important feature of the membrane is that it remains fluid; the lipids and proteins in the cell membrane are not rigidly locked in place. Q: The cell membrane consists of two adjacent layers of what? Choices: - lecithin - membranes - eukaryotes - phospholipids A:
phospholipids
(Question)
Answer the following question given this paragraph: These vividly colored maple leaves were all bright green during the summer. Every fall, leaves of maple trees change to brilliant red, orange, and yellow colors. A change of color is a sign that a chemical change has taken place. Maple leaves change color because of chemical reactions. Q: What causes maple leaves to change their colors? Choices: - artificial preservatives - factor reactions - radiation reactions - chemical reactions A:
(Answer)
chemical reactions
Ques: Answer the following question given this paragraph: The electrical conductivity of a substance is a property that depends only on the type of substance. Silver, gold, and copper are excellent conductors of electricity, while glass and plastic are poor conductors. A larger or smaller piece of glass will not change this property. An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount. Other intensive properties include color, temperature, density, and solubility. Q: Silver, gold, and copper all conduct what very well? Choices: - light - sound - microwaves - electricity A:
Ans: electricity
(Q).
Answer the following question given this paragraph: Sensory neurons carry nerve impulses from tissues and organs to the spinal cord and brain. Q: What can carry nerve impulses from tissues and organs to the spinal cord and brain? Choices: - healthy neurons - motor neurons - respiratory neurons - sensory neurons A:
(A).
sensory neurons
Ques:Answer the following question given this paragraph: All living things need energy. They need it to power the processes of life. For example, it takes energy to grow. It also takes energy to produce offspring. In fact, it takes energy just to stay alive. Remember that energy can't be created or destroyed. It can only change form. Energy changes form as it moves through ecosystems. Q: Energy cannot be created or destroyed - it can only change what? Choices: - kind - fluid - shape - form A:

Ans:form
Ques:Answer the following question given this paragraph: When fertilizer ends up in bodies of water, the added nutrients cause excessive growth of algae. This is called an algal bloom. You can see one in Figure below . The algae out-compete other water organisms. They may make the water unfit for human consumption or recreation. Q: When fertilizer ends up in bodies of water, the added nutrients cause excessive growth referred to as what, which can render the water unfit for human consumption or recreation? Choices: - chemical bloom - caustic bloom - agricultural bloom - algal bloom A:

Ans:
algal bloom