Ques: Q: Carboxylic acids are weak acids, meaning they are not 100% ionized in what? Choices: - air - ethanol - liquid - water A:
Ans: water

Ques: Q: Osmotic pressure is important in biological systems because cell walls are what? Choices: - impassable - theonym membranes - variably membranes - semipermeable membranes A:
Ans: semipermeable membranes

Ques: Q: Composed largely of the polysaccharide chitin, the exoskeleton provides an effective barrier defense against most what? Choices: - parasites - white blood cells - vaccines - pathogens A:
Ans: pathogens

Ques: Q: What is contained in the cavity of a long bone's central shaft? Choices: - blood - calcium - cells - marrow A:
Ans:
marrow