Which is true about a tornado? A. It can be as dangerous as a hurricane, but affects a smaller area.
B. Its winds typically reach 300 miles per hour.
C. Its centre is full of sleet and ice.
D. It develops over tropical waters of the Atlantic Ocean.

Which of these describes nerve cells? a. specialized cells that protect the body from harmful bacteria b. specialized cells that maintain structural support c. specialized cells that send messages from one part of the body to another d. specialized cells that the body move freely and maintain flexibility