Which part of the respiratory system is the spongy organ that takes in air through the trachea?

What are situations in which the cell cycle might occur more quikly than normal?

Which part of the heart takes blood from the veins and pumps it into a ventricle? A. ventricles B. valves C. arteries D. atria

Which is the following to the best explanation to why it is important to follow lab safety guidelines

Which of the following is not a primary cause of eroding rock? moving water gusting wind animal habitation gravity

Which would be a common-sense practice in a lab environment? keeping quiet about accidents washing hands before the lab taking a water bottle to drink scratching one's face during the lab

The growth of organisms in an ecosystem can be limited by the amount of water and light the ecosystem receives. a. True b. False

What is the most likely cause of plate movement? A) radiation from the sun B) cold air currents on earths surface C) heat convection within the earth D) movement of ice sheets

The closer together a magnet's magnetic field lines are, a. the weaker the magnetic field. b. the stronger the magnetic field. c. the closer they are to the magnet's center. d. the closer they are to disappearing.

What are two things that carbohydrates and lipids have in common? A. Both contain C, H, O and N and are formed by dehydration snythesis. B. Both contain C, H, O and serve as a source of energy. C.

Stellar equilibrium is a balance between what two things? A. Outward and inward gravity. B. Outward pressure from light and inward pressure from heat. C. Outward pressure from hydrogen and inward helium. D. Outward pressure and inward gravity