NLN SCIENCE PRACTICE TEST QUESTIONS WITH VERIFIED SOLUTIONS ALREADY GRADED A+

A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of the slide containing a large number of swimming parmecium. 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 they will eventually all swim away from the ammonium hydroxide 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 use a breathalyzer Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:00 Full screen 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 oxygen nitrogen 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? red blood cells release hemoglobin bone marrow cells decrease platelet production white blood cells release antibodies ruptured platelets release thromboplastin ruptured platelets release thromboplastin 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 carbon dioxide Guard cells which can be found in the leaves of plants are most closely associated with which of these processes? reproduction of a new plant evaporation of water from the plant synthesis of organic substances in the plant movement of organic and inorganic substances from soil to the plant Human testes produce? eggs follicle stimulating hormones growth hormone spermatozoa spermatozoa 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 50-75% If the medulla of the brain in a human was damaged, which of these conditions would most liekly result? inability to remember difficultly in breathing inability to speak blurred vision difficultly breathing In ecological succession, the first living thing to colonize a hitherto barren area is called a? producer primary consumer pioneer organism carnivore pioneer organism In varieties of matter, the term heterogeneous may be applied to? elements, but not compounds compounds, but not elements compounds and elements, but not mixture mixtures, but not elements or compounds mixtures, but not elements or compounds Heat energy is absorbed in which of these phase changes? Br2 (I) -> Br2(s) Br2 (g) -> Br2 (I) Br2 (I) -> Br2 (g) Br2 (g) -> Br2 (s) Br2 (I) -> Br2 (g) The atoms of an element with seven valence electrons are most probably classified as? metals nonmetals metalloids noble gases metals The bending of a wave around an obstacle is known as? diffraction deflection refraction reflection diffraction The inherited factors that are transmitted in an organism from generation to generation are called its? homozygote heterozygote genotype phenotype genotype The organ that filters metabolic waste from blood is the? small intestine liver kidney stomach kidney The process of nuclear cell division is the cell reproduction of plants from mammals. A major difference is that? homologous chromosomes are paired centrioles are replicated spindle fibers are missing cell plates are synthesized homologous chromosomes are paired Which of these hydrocarbons is a member of the benzene family? toluene ethane propanone methanol toluene Which of these organisms use nitrogen directly from the air? blue-green algae protozoa plants worms Which of these processes is responsible for the recorded production of CO2 by yeast cells from sugar solution? photosynthesis anaerobic respiration translocation capillary actions anaerobic respiration Which of these quantities is most closely associated with an object's inertia? weight energy power mass mass Which of these single instruments may be used to measure the current flowing through a circuit? a voltmeter an ammeter a potentiometer an ohmmeter an ammeter Which part of the cell structure controls the passage of materials into and out of the cell? Golgi apparatus ribosomes nuclear membrane plasma membrane plasma membrane Within which of these structures of the female reproductive tract is the huaman egg fertilized? uterus fallopian tube vagina cervix fallopian tube You cut your finger rather deeply while slicing an apple. Which of these actions should you take first? apply a sterile adhesive bandage press the cut surface to stop the flow of blood swab the wound with mild antiseptic wash the wound continuously with cold running water wash the wound continuously with cold running water All living cells contain cytoplasm. Cytoplasm is important because it? carries hereditary traits controls what moves in and out of the cell produces protein is where most of the cell's chemical reactions take place An example of the most complex level of organization in a frog is the? epithelium striated muscle respiratory system stomach Anaerobic respiration occurs in muscle tissue when it cannot get sufficient oxygen to function aerobically. Which of these conditions is most likely to directly result from this? cramps necrosis bleeding swelling Cicero and Wozniak used young rats in their experiment instead of older rats because young rats are? healthier most liekly to survive an experiment easier to train more 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? structural isomers linkage isomers optical isomers geometrical isomers structural isomers Ductless glands in the human body secrete? enzymes mucus hormones metabolic wastes hormones During exercise, a person's respiratory rate increases due to? an increase in CO2 concentration in the blood a decrease in O2 concentration in the lungs an increase in hemoglobin in the blood a decrease in CO2 concentration in the blood an increase in CO2 concentration in the blood