Question

9、
a tough supportive tissue that is softer and more flexible than bone is called
○ a joint.
a
○ a ligament.
○ marrow.
○ cartilage.

10.
bones are held together by ______________.
○ ligaments
a
○ joints
○ ossification
○ cartilage

Explanation:

For question 9: Joints are connections between bones, ligaments connect bone to bone, marrow is inside bones for blood cell production, while cartilage is a tough, flexible supportive tissue softer than bone.
For question 10: Ligaments are fibrous tissues that bind bones together at joints; joints are the connection points, ossification is bone formation, and cartilage is a cushioning tissue, not a bone connector.

Answer:

1. D. cartilage.
2. A. ligaments