Which of the following statements is true 1.Boiling and Melting points are chemical properties 2. A molecule of oxygen can have atoms of carbon in it 3. Elements are substances made of only one type of atom 4. The number of electron shells in an atom is called the atomic number

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above