Ques: Answer the following question given this paragraph: 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: Answer the following question given this paragraph: Living organisms are comprised of organic compounds, molecules built around the element carbon. Q: Living organisms are comprised of organic compounds, which are molecules built around what element? Choices: - oxygen - silicon - helium - carbon A:
Ans: carbon

Ques: Answer the following question given this paragraph: Attached to the placenta is the amniotic sac , an enclosed membrane that surrounds and protects the fetus (see Figure above ). It contains amniotic fluid, which consists of water and dissolved substances. The fluid allows the fetus to move freely until it grows to fill most of the available space. The fluid also cushions the fetus and helps protect it from injury. Q: The amniotic sac is attached to what? Choices: - Umbilical Cord - Stomach - uterus - placenta A:
Ans: placenta

Ques: Answer the following question given this paragraph: An isotonic solution is a solution in which the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell. Q: In which solution is the amount of dissolved material equal both inside and outside of the cell? Choices: - supersaturated - exothermic - hypotonic - isotonic A:
Ans:
isotonic