The white tern bird that catches fish by plunging into the water. what physical features of the bird likely make this feeding behavior possible?

What is the nature of the ca-cl bond in a molecule of calcium chloride (cacl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.16?

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .