What vessel returns fluid from the lymphatic system to the circulatory system?

a. thoracic duct

c. lymphatic vein

b. aorta

d. urethra

Which of these are electromagnetic waves? A. light and radio waves B. sound waves C. ocean waves and earthquake vibrations

Who is paul revere's and what did he do in u. s history

What protein looks looks like a cork screw?

Explain why DNA must be copied during the cell cycle.

Tom is a scientist who is observing the rise of sea levels every year. How much of a rise in sea level would Tom observe in any one year? A. 0.5-1mm B. 1-2mm C. 2-4mm D. 4-6mm

Why is injury to large areas of the skin dangerous?

Which of the following correctly describes seafloor spreading? A. New oceanic crust is formed at midocean ridges, pushed away from the ridge, and destroyed at deep-sea trenches. B.

How to arrange from smallest to biggest organ, organism, gene, nucleus, cells, tissue, chromosome, system?

Tracheids and vessels together make up A. xylem. B. phloem. C. chloroplasts. D. a plant cell.

Which statement is true for single-celled organisms? A. They are often harmless. B. They always cause disease. C. They only live inside humans. D. They reproduce in a complicated process.