Download NLN Pax science Questions and Correct Answers Updated 2025 Graded A and more Exams Science education in PDF only on Docsity!
NLN Pax science Questions and Correct
Answers Updated 2025 Graded A
1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower .specific heat .conductive heat .heat of fusion .heat of vaporization. - ANS.specific heat 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 - ANSvariation within a species. A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will be observed? -They will eventually all swim toward the ammonium hydroxide. -They will show no net change in behavior to the ammonium hydroxide. -They will all be instantly killed by the ammonium hydroxide.
-They will eventually all swim away from the ammonium hydroxide. - ANS- They will eventually all swim away from the ammonium hydroxide. A lab technician has the choice of four different enzymes to use in an experiment that will run at 25°C. The optimal temperatures of enzymes using the Kelvin scale are: Enzyme A: 273 K, Enzyme B: 298 K, Enzyme C: 310 K, Enzyme D: 325 K. Which enzyme would be the best to use in this experiment? - ANSEnzyme B A magician rapidly pulls a tablecloth from a table, leaving the dishes undisturbed. Which of these principles of physics explains this "trick"? - ANSObjects at rest tend to remain at rest. A material that settles out of a reaction is termed a(n) - ANScolloid A method for determining the blood alcohol content of a subject is to do a Mantoux test. do a Dick test. use a Breathalyzer. inspect the size of the pupils. - ANSuse a Breathalyzer. 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. hydrogen.
All of these groups of land plants produce seeds EXCEPT - ANSevergreen trees, such as pines and spruces. An example of the most complex level of organization in a frog is the - ANSrespiratory system An unknown gas is more dense than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably ammonia. methane. carbon dioxide. hydrogen. - ANScarbon dioxide. Cicero and Wozniak probably decided to restrict their study to male offspring of alcoholic male rats because they wanted to - ANScompare results with prior findings from human studies. Cicero and Wozniak used young rats in their experiment instead of older rats because young rats are - ANSmore sensitive to alcohol. Compounds with the same type and number of atoms and the same chemical bonds but different spatial arrangements of these bonds and atoms are called - ANSstructural isomers. How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110 V? (V = IR) - ANS1.1 amperes.
If a person is fasting for 24 hours and ingests no carbohydrates, the liver will provide for the body's need by - ANSconverting glycogen into glucose. If a red light is passed through a dilute solution of chlorophyll solution, the spectrophotometer will detect what amount of transmittance of this light? 100% 50 - 75% Less than 25% None - ANS50 - 75% If all of the second-order consumers within an ecosystem of a region were removed, the most likely short-term effect would be - ANSan increase in the number of first-order consumers. If the medulla of the brain in a human was damaged, which of these conditions would most likely result? Inability to remember. Difficulty in breathing. Inability to speak. Blurred vision. - ANSDifficulty in breathing. If the night temperature drops 50 degrees, the roadrunner's internal energy-conservation permits a lowering of body temperature to - ANS94°F
The Law of Dominance was proposed by which of the following scientists?
- ANSMendel The most probable area of study that would show the prevalence of mental illness in mid-Manhattan is that of - ANSepidemiology. The normal boiling temperature for water is 100° when measured on which of these scales? Celsius. Fahrenheit. Kelvin. Rankine. - ANSCelsius. The organ that filters metabolic waste from the blood is the small intestine. liver. kidney. stomach. - ANSkidney. The process of nuclear cell division in the cell reproduction of plants differs from mammals. A major difference is that homologous chromosomes are paired. centrioles are replicated. spindle fibers are missing.
cell plates are synthesized. - ANScell plates are synthesized. The succession of flora and fauna encountered while climbing a mountain in the northern hemisphere is similar to that found when traveling from the base of the same mountain in which of these general directions? - ANSnorth The watt is a unit of - ANSpower To determine the optimum conditions for the activity of a digestive enzyme, it would be necessary to test its activity over a range of - ANStemperature, pH and substrate concentration. Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of monerans. plants. fungi. protozoans. - ANSprotozoans. When a column of air is vibrating at the same rate as a tuning fork, the process is referred to as - ANSresonance When a population is in Hardy-Weinberg equilibrium, which of these conditions must be present?
Presence of urea and mineral salts. Presence of glucose and protein. Presence of urea and absence of glucose. - ANSPresence of glucose and protein. Which of these hydrocarbons is a member of the benzene family? Toluene. Ethyne. Propanone. Methanol. - ANSToluene. Which of these is an example of an emulsion? Salt water. Hydrochloric acid (aq). Mayonnaise. Copper sulfate. - ANSMayonnaise. Which of these is NOT an organic compound? CH4 (methane). C6H12O6 (glucose). CH3COOH (acetic acid). HCl (hydrochloric acid). - ANSHCl (hydrochloric acid).
Which of these is the correct sequence of chambers through which blood flows in the human heart and lungs? - ANSRight atrium; right ventricle; lungs; left atrium; left ventricle. Which of these organ systems does NOT provide for the excretion of substances? - ANSlymphatic system Which of these pairs of units measures the same quantity? Joule and newton. Newton and watt. Calorie and joule. Watt and calorie. - ANSCalorie and joule. Which of these processes is illustrated by the spreading out of ammonia vapor in a closed room? - ANSDiffusion. Which of these processes is used to free contaminated water of bacteria? - ANSTreating it with chlorine. Which of these quantities is a vector quantity? Force. Mass. Energy. Time. - ANSForce.
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 as - ANSDiffusion You cut your finger rather deeply while slicing an apple. Which of these actions should you take first? - ANSWash the wound continuously with cold running water.
