PAX Science NLN Exams collection 2022-2023 LATEST, (Answered) | Verified 161 Q/A 1.A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person's breath contains:
carbon dioxide 2.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:
ruptured platelets release thromboplastin 3.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?the approximate focal length of the lens 4.In ecological succession, the first living thing to colonize a hitherto barren
area is called a:pioneer organism
5.Unicellular organisms that have a nucleus and can swim with the aid of cilia
are examples of:protozoans
6.Which of these conditions is associated with smoking?emphysema 7.Which of these quantities is most closely associated with an object's inertia?Mass 8.Which of these sequences of anatomic organization, from the simplest level to the most complex, is the correct sequence?From tissue, organ, organ system to organism 9.Which part of the cell structure controls the passage of materials into and out of the cell?Plasma membrane 10.While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her hand. What is the first action this student should take?Flush her hand with large quantities of water 1 / 2
11.Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is used up. This creates a concentration gradient across the cell membrane, drawing O2 across the membrane from the outside in, a process known asDiffusion 12.You cut your finger rather deeply while slicing an apple. Which of these actions should you take first?Wash the wound continuously with cold running water 13.30 students in a class carefully measure the length and width of 20 peanut shells. They also count the number and note the size of the peanuts inside.This information is recorded on various graphs showing the numbers of nuts and the different sizes. The collected evidence of the peanuts gives the
students an idea of the extent of:variation within a species
14.A *tincture* is a solution in which:alcohol is the solvent
15.All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of the kidney nephron is returned to the tissue fluid while passing
along the proximal tubule. This rapid return is effected by the process of:
active transport 16.If the night temperature drops 50 degrees, the roadrunner's internal
energy-conservation permits a lowering of body temperature to:94°F
17.1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat energy. The final temperatures on X and Y is 15C and 20C,
respectively. Compared to X, Y must have a lower:Fspecific heat
18.A woman suddenly chokes on a piece of food and clutches frantically at her
throat. An immediate remedy is to:apply quick, hard pressures
successively to her abdomen, just below her diaphragm 19.An unknown gas is more dense than air, does not support combustion, and
turns a limewater solution cloudy. This gas is most probably:carbon
dioxide
20.Night blindness in humans is caused by a lack of:Vitamin A
21.In varieties of matter, the term heterogeneous may be applied to:
mixtures, but not elements or compounds 22.The atoms of an element with seven valence electrons are most probably
classified as:nonmetals
23.The inherited factors that are transmitted in a organism from generation to
generation are called its:genotype
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