Which of these is a waste material that is removed from the human body by the respiratory system?
carbon dioxide
water
oxygen
sodium chloride

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse