Chloe and her sister love to get in the car when there was fog on the windows. They enjoyed dragging their fingers over the window to spell their names. Which of the terms best describes why the fog appears on the car windows? A: melting B: freezing C: condensation D:evaporation

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen