Answer the following question given this paragraph: The central nervous includes the brain and spinal cord. The brain is the control center of the nervous system. It controls virtually all mental and physical processes. The spinal cord is a long, thin bundle of nervous tissue that passes messages from the body to the brain and from the brain to the body. Q: The brain and spinal cord are part of what system, which serves as a control center? Choices: - primary nervous system - active nervous system - large nervous system - central nervous system A:
central nervous system
(Question)
Answer the following question given this paragraph: Enzymes are involved in most of the biochemical reactions that take place in organisms. About 4,000 such reactions are known to be catalyzed by enzymes, but the number may be even higher. Enzymes allow reactions to occur at the rate necessary for life. Q: What substances serve as catalysts in most of the biochemical reactions that take place in organisms? Choices: - hormones - carbohydrates - iseotrops - enzymes A:
(Answer)
enzymes
Ques: Answer the following question given this paragraph: Some insects use siphoning, as if sucking through a straw, like moths and butterflies. This long mouth-tube that they use to suck up the nectar of the flower is called a proboscis . Some moths, however, have no mouthparts at all. Some insects obtain food by sponging , like the housefly. Sponging means that the mouthpart can absorb liquid food and send it to the esophagus. The housefly is able to eat solid food by releasing saliva and dabbing it over the food. As the saliva dissolves the food, the sponging mouthpart absorbs the liquid food. Q: The long mouth-tube that some insects use to suck up the nectar of the flower is called what? Choices: - stamen - prosthesis - pistil - proboscis A:
Ans: proboscis
(Q).
Answer the following question given this paragraph: Figure 6.11 The frictional force supplies the centripetal force and is numerically equal to it. Centripetal force is perpendicular to velocity and causes uniform circular motion. The larger the F c , the smaller the radius of curvature r and the sharper the curve. The second curve has the same v , but a larger. Q: What force is perpendicular to velocity and causes uniform circular motion? Choices: - centripetal torque - circular friction - tangential force - centripetal force A:
(A).
centripetal force
Ques:Answer the following question given this paragraph: The stratosphere contains a layer of ozone gas. Ozone consists of three oxygen atoms (O 3 ). The ozone layer absorbs high-energy UV radiation. As you can see in Figure below , UV radiation splits the ozone molecule. The split creates an oxygen molecule (O 2 ) and an oxygen atom (O). This split releases heat that warms the stratosphere. By absorbing UV radiation, ozone also protects Earth's surface. UV radiation would harm living things without the ozone layer. Q: What is the name for the stratospheric gas layer that protects living things from uv radiation? Choices: - carbon layer - atmospheric layer - toposphere - ozone layer A:

Ans:ozone layer
Ques:Answer the following question given this paragraph: Convection in the mantle drives the movement of the plates of lithosphere over the Earth's surface. New oceanic crust forms at the ridge and pushes the older seafloor away from the ridge horizontally. Q: Convection in which part of the earth drives the movement of the plates of lithosphere over the earth's surface? Choices: - atmosphere - ocean - upper crust - mantle A:

Ans:
mantle