Please help me with these questions on the Skeletal System 1. Which is not a function of the skeletal system?
A. Movement and protection B. Homeostasis C. Support D. Transport oxygen-rich blood to the body

2. Which organism has an exoskeleton?
A. A shark B. A human C. A black bear D. A common beetle

3. What is main function of the skull?
A. To keep out electromagnetic waves B. Allows for movement from one place to another C. Produces brain cells D. Protects the brain from injury

4. Tendons and ligaments are used to .
A. Exchange gases within the body B. Transport nutrients to cells C. Produce red blood cells D. Attach bones to muscles and bones to bones.

1 - D- Transport oxygen-rich blood to the body

Explanation:

2- D- Common Beetle

3- D- Protects the brain from injury

4- D- Attach Bones to muscles and bones to bones.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.