Which of the following is a function of the lymph nodes in the lymphatic system?

Which type of galaxy has a flattened disk structure with spiral arms and a central bulge?

What is the chemical symbol for sodium?

What is the term for the process by which rocks change form or structure due to heat, pressure, or mineral composition changes?

What is the formula for water?

Which element is essential for organic compounds but is not found in inorganic compounds?

Which moon of Neptune is the coldest known object in our solar system, with surface temperatures close to absolute zero?

What is the term for the point in a planet's orbit where it is farthest from the Sun?

What is the name of the process by which a substance changes directly from a solid to a gas without passing through the liquid phase?

What is the term for a type of galaxy that does not have a distinct shape, containing a mix of old and young stars?