Q: What is the world's most serious resource problem? Read this paragraph and choose the correct option from the provided answers: Most Americans have plenty of fresh, clean water. But many people around the world do not. In fact, water scarcity is the world's most serious resource problem. How can that be? Water is almost everywhere. But much of it is unusable. What is usable is not always where it is needed. Choices: - gas shortage - citrus blight - deforestation - water scarcity A:
water scarcity

Q: What unit of measurement determines how far something travels in a given amount of time? Read this paragraph and choose the correct option from the provided answers: How fast or slow something moves is its speed . Speed determines how far something travels in a given amount of time. The SI unit for speed is meters per second (m/s). Speed may be constant, but often it varies from moment to moment. Choices: - distance - volume - density - speed A:
speed

Q: Q: A single amino acid substitution in hemoglobin leads to what disease? Read this paragraph and choose the correct option from the provided answers: Figure 3.26 The beta chain of hemoglobin is 147 residues in length, yet a single amino acid substitution leads to sickle cell anemia. In normal hemoglobin, the amino acid at position seven is glutamate. In sickle cell hemoglobin, this glutamate is replaced by a valine. Choices: - crohn's disease - AIDS - down's syndrome - sickle cell anemia A:
A: sickle cell anemia

Question: Q: What type of movements are produced when the angle between the bones of a joint changes? Read this paragraph and choose the correct option from the provided answers: The wide range of movement allowed by synovial joints produces different types of movements. Angular movements are produced when the angle between the bones of a joint changes. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow is an example of flexion. Extension is the opposite of flexion in that the angle between the bones of a joint increases. Rotational movement is the movement of a bone as it rotates around its own longitudinal axis. Movement of the head as in saying "no" is an example of rotation. Choices: - microscopic - circular - oblong - angular A:
Answer: angular

*Question*
Q: At what age is skeletal maturity reached by humans? Read this paragraph and choose the correct option from the provided answers: Bones become increasingly ossified and grow larger during fetal development, childhood, and adolescence. When skeletal maturity is reached at about age 20, no additional growth in bone length can occur. Choices: - 40 - 30 - 15 - 20 A:
**Answer**
20

(Q).
Q: What are the newest, outer layers of secondary xylem called? Read this paragraph and choose the correct option from the provided answers: Choices: - bark - fibrous - vascular - sapwood A:
(A).
sapwood