Ques:Answer the following question given this paragraph: The brains of all mammals have a unique layer of nerve cells covering the cerebrum. This layer is called the neocortex (the pink region of the brains in Figure above ). The neocortex plays an important role in many complex brain functions. In some mammals, such as rats, the neocortex is relatively smooth. In other mammals, especially humans, the neocortex has many folds. The folds increase the surface area of the neocortex. The larger this area is, the greater the mental abilities of an animal. Q: What is the unique layer of nerve cells covering the cerebrum in mammals' brains called? Choices: - the midbrain - the neural - cerebral cortex - the neocortex A:

Ans:the neocortex
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Ques:Answer the following question given this paragraph: Indeed, scientists discovered something astonishing. Many times in Earth's history, the magnetic poles have switched positions. North becomes south and south becomes north! When the north and south poles are aligned as they are now, geologists say it is normal polarity. When they are in the opposite position, they say that it is reversed polarity. Q: What feature of the land do contour lines show? Choices: - trails - flat surfaces - bodies of water - three-dimensional shape A:

Ans:three-dimensional shape
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Ques:Answer the following question given this paragraph: Interspecific competition often leads to extinction. The species that is less well adapted may get fewer of the resources that both species need. As a result, members of that species are less likely to survive, and the species may go extinct. Q: What kind of competition often leads to extinction because the species that is less well adapted gets fewer of the resources that both species need? Choices: - intraspecific competition - parasitism - mutualism - interspecific competition A:

Ans:interspecific competition
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Ques:Answer the following question given this paragraph: If a solute is a solid or liquid, increasing the temperature increases its solubility. For example, more sugar can dissolve in hot water than in cold water. Q: What does increasing a solute's temperature do? Choices: - increases its viscosity - decrease its solubility - no change - increases its solubility A:

Ans:
increases its solubility
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