NLN - ? PRACTICE TEST SCIENCE PAX EXAM ALL STUDY GUIDE 2022

NLN - ? PRACTICE TEST SCIENCE PAX EXAM ALL STUDY GUIDE 2022 An organism with chloroplast in its cell is probably a - Answer- autotroph autotrophs - Answer- are organisms that produce their own food from inorganic substances, plants are autotrophs heterotrophs - Answer- obtain their food by consuming plants or other animals. They are also referred to as consumers. Primary consumers may be herbivores herbivores - Answer- plant eaters omnivores - Answer- plant and meat eaters Secondary consumers - Answer- are carnivores, meat eaters, or omnivores that eat herbivores. Tertiary consumers are carnivores that eat - Answer- other carnivores or omnivores. What property of water allows someone to fill a glass slightly above the rim without the water flowing over? - Answer- surface tension Water molecules are polar. This is due to the fact that oxygen draws the electrons in the molecule toward itself. Thus, there is a negative charge surrounding the oxygen and a positive charge around the hydrogen. The unbalanced charges cause the water molecules to cluster, and this gives the water the properties called surface tension. Surface tension is the the attraction between molecules at the surface of a liquid, which allows a glass to be filled above the rim without the water flowing over. The gap between the neurons are called - Answer- synapses Which group of chemicals are not normally found in most living things? - Answersilicates Carbohydrates, proteins and nucleic acids (RNA and DNA) are all very important chemicals in living things. Silicates examples are in sand and glass The alimentary canal is associated with the - Answer- the whole passage along which food passes through the body from mouth to anus. It includes the esophagus, stomach, and intestines. digestive tract The numerous villi in the small intestine serve to - Answer- provide greater surface area for absorption As light passes obliquely from air to water, it is bent. The bending is called - Answerrefraction refraction is the bending of light as it passes obliquely from one medium to another, in this case from air to water. The speed of light wave changes changes when it changes media. When the light wave enters the second medium at an oblique angle, it changes direction; the light wave is bent. diffraction - Answer- refers to the spreading of light waves as they pass through a narrow opening reflection - Answer- occurs when light bounces off an object. dispersion - Answer- occurs when light is separated into its spectrum Which of the following organelles is not involved in protein synthesis? - Answermitochondrion To be absorbed by cells, proteins must be changed into - Answer- amino acids A neuron that transmits impulses from the receptors to the spinal cord is called - Answer- a sensory neuron Potential energy can be thought of a function of height. Since total energy is always conserved, the kinetic energy is at its maximum when the potential is at its minimum. - Answer- or at the bottom of the incline. Which group of organisms can helps prevent the accumulation of organic wastes in nature? - Answer- mosses is an algae the correct answer is bacteria = bacteria comprise the decomposer portion of the food chain. They are responsible for recycling organic material into inorganic material that plants can use to undergo photosynthesis. As the eardrum is made to vibrate more rapidly, the sound is perceived as - Answerhigher in pitch high pitch sounds are heard when the receptor cells closer to the oval window are stimulated, and low-pitch sounds result from the stimulation of the cells that are farther down the cochlea. The more rapid the vibration is, the higher the pitch In a field of pure white asters, a grower noticed a single blue aster. How could the grower test whether this change affected the gamete-producing cells of the plant? - Answer- self-pollinate the flower, and plant the resulting seeds. Self pollination would allow the plant to produce gametes sperm and eggs that would unite and form seeds. Observing the color of the plants from these seeds would allow the planter to determine whether this change occurred at the level of the gametes. A human egg will develop into a female if it is fertilized by a sperm containing - Answer- XX chromosome XY - male` In a food chain involving grass, grasshoppers, birds, and mammals, the original source of energy is - Answer- sunlight Which of the following is an neutralization reaction? H2CO3 + Ca(OH)2 ---> 2H2O + CaCO3 Is an reaction between an acid (carbonic acid) and a base [Ca(OH)2] to form water and a salt. - Answer- A reaction that removes essentially all H+ and OHIn the context of a chemical reaction the term neutralization is used for a reaction between an acid and a base acid + base → salt + water Acids are ionic compounds ( a compound with a positive or negative charge) that break apart in water to form a hydrogen ion (H+). Example: HCl (Hydrochloric acid) in water *Bases are ionic compounds that break apart to form a negatively charged hydroxide ion (OH-) in water. Example: NaOH (Sodium Hydroxide-a strong base) in water When oxygen goes from air in the lungs into the blood, it does so by - Answerdiffusio. CONTINUES...