NLN Pax Science practice tests

NLN Pax Science practice tests A person blows his breath into a straw that is placed in limewater. The limewater becomes cloudy because the person's breath contains: ans: carbon dioxide A person who was in an auto accident has formed a blood clot at the site of the injury. One event that can lead to formation of a blood clot is that: ans: ruptured platelets release thromboplastin A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct measurements can the student make as a result of this experiment? ans: the approximate focal length of the lens In ecological succession, the first living thing to colonize a hitherto barren area is called a: ans: pioneer organism Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of: ans: protozoans Which of these conditions is associated with smoking? ans: emphysema