Which of the following statements is true?
a. the wrist is a ball-and-socket joint.
b. the skull has many immovable joints, connecting various bones.
c. the skull has no joints and is a complete bone.
d. the elbow is a saddle joint.

The answer is option b.

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.