NLN PAX PREP Science - Spring 2021. Questions and answers. 100% Proven pass rate

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Which of these structures of the male reproductive system carries sperm cells from the testes to the lower part of the abdomen? - ✔✔Vas deferens A method for determining the blood alcohol conte... nt of a subject is to - ✔✔Use 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 A physician measures the pulse and blood pressure (BP) of all patients on a routine basis. Which of these measurements show the normal BP values for a resting adult patient? - ✔✔120/80 mm Hg 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. 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 beneath her diaphragm. An unknown gas is denser than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably - ✔✔Carbon dioxide Guard cells which can be found in the leaves of plants are most closely associated with which of these processes? - ✔✔Evaporation of water from the plant. Human testes produce - ✔✔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? - ✔✔50% - 75% If the medulla of the brain in a human was damaged, which of these conditions would most likely result? - ✔✔Difficulty in breathing In ecological succession, the first living thing to colonize a hitherto barren area is called A. producer B. primary consumer C. pioneer organism D. carnivore - ✔✔Pioneer organism In varieties of matter, the term heterogeneous may be applied to - ✔✔Mixtures, but not elements or compounds The inherited factors that are transmitted in an organism from generation to generation are called its Homozygote. - ✔✔Genotype The organ that filters metabolic waste from the blood is the Small intestine. - ✔✔kidney Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of Monerans. A. monerans B. plants C. fungi D. protozoans - ✔✔protozoans Which of these conditions is associated with smoking? - ✔✔Emphysema Which of these organisms use nitrogen directly from the air? - ✔✔Blue-green algae. Which of these particles can only be found in the nucleus of an atom? - ✔✔protons and neutron Which of these processes is responsible for the recorded production of CO2 by yeast cells from sugar solution? - ✔✔Anaerobic respiration Which of these quantities is a vector quantity? - ✔✔Energy Which of these temperatures is known as Absolute Zero? - ✔✔O ° K 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. Within which of these structures of the female reproductive tract is the human egg fertilized? - ✔✔Fallopian tube A cell which manufactures a large amount of protein for export would have an abundance of organelles called - ✔✔Ribosomes A substance that increases the speed of a reaction by lowering its activation energy is called - ✔✔A catalyst All of these groups of land plants produce seeds EXCEPT A. perennial flowering plants, such as peonies and asters. B. deciduous trees, such as maple and oaks. C. moist forest plants, such as mosses and ferns. D. evergreen trees, such as pines and spruces. - ✔✔moist forest plants, such as mosses and ferns (NOTE: "Evergreen trees, such as pines and spruces" is NOT the right answer even though NLN practice test says so!) As part of the human immune response, which of these cells are responsible for producing antibodies? - ✔✔Lymphocytes Ductless glands in the human body secrete - ✔✔Hormones Ganglia are made up of a cluster of - ✔✔neurons If a person is fasting for 24hrs and ingest no carbohydrates the liver will provide for the body's need by - ✔✔Converting glycogen into glucose If all of the second-order consumers within an ecosystem of a region were removed, the most likely short-term effect would be - ✔✔An increase in the number of first-order consumers In a study on the effect of cocaine on the brains of rats, two groups of animals were selected. Each day, Group A was injected with the drug dissolved in water, whereas Group B was injected with water alone. In such a study Group B is included as - ✔✔A control group In the reaction of iron with water shown below, what coefficient mus [Show More]

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