Q: Q: Which veins return oxygen-rich blood from the lungs to the heart? Choices: - jugular - varicose - respiratory - pulmonary A:
A: pulmonary

Q: Q: Green plants known as producers provide basic food supply for what besides themselves? Choices: - minerals - air - water - animals A:
A: animals

Q: Q: What type of resource cannot be replaced as easily as it is consumed? Choices: - biological - renewable - untapped - nonrenewable A:
A: nonrenewable

Q: 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