Q: Answer the following question given this paragraph: Today in many countries, death rates have gone down but birth rates remain high. This means that the population is growing. Figure below shows the growth rates of human populations all over the world. Q: Which veins return oxygen-rich blood from the lungs to the heart? Choices: - jugular - varicose - respiratory - pulmonary A:
A: pulmonary

Q: Answer the following question given this paragraph: Q: Green plants known as producers provide basic food supply for what besides themselves? Choices: - minerals - air - water - animals A:
A: animals

Q: Answer the following question given this paragraph: A nonrenewable resource is one that cannot be replaced as easily as it is consumed. Fossil fuels are an example of nonrenewable resources. They take millions of years to form naturally, and so they cannot be replaced as fast as they are consumed. To take the place of fossil fuel use, alternative energy resources are being developed. These alternative energy sources often utilize renewable resources. The following are examples of sustainable alternative energy resources:. Q: What type of resource cannot be replaced as easily as it is consumed? Choices: - biological - renewable - untapped - nonrenewable A:
A: nonrenewable

Q: Answer the following question given this paragraph: Static friction acts on objects when they are resting on a surface. For example, if you are walking on a sidewalk, there is static friction between your shoes and the concrete each time you put down your foot (see Figure below ). Without this static friction, your feet would slip out from under you, making it difficult to walk. Static friction also allows you to sit in a chair without sliding to the floor. Can you think of other examples of static friction?. Q: When you are walking on a sidewalk, what occurs between your shoes and the concrete each time you put down your foot? Choices: - movement - progress - grip - static friction A:
A: static friction