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The presence of many mitochondria is typical of cells that carry out active transport. Explain why this is so.What gas is made from burning fossil fuels?a. oxygenb. nitrogenc. methaned. carbon dioxideFossils are found in what rocks?a. sedimentaryb. igneousc. metamorphicd. all 3Which of the following molecules is a covalent compound?a. sulfur dioxideb. sodium chloridec. strontium chlorided. copper (I) nitrideWhat was first on earth?a. birdsb. fishc. reptilesd. amphibians38. Which of the following parts of an animal cell deal primarily with synthesizing protein chains?A. RibosomesB. MitochondriaC. CytoplasmD. Cell MembraneWhich of the following events happens the most often during a calendar year?A. The Earth completes a full rotation on its axis.B. The Moon completes a full revolution around the Earth.C. The Earth completes a full revolution around the Sun.D. The Earth tilts a full 180 degrees on its axis.What is the term for the process of releasing atomic energy by bombarding a dense element with neutrons and splitting its nucleus?A. FusionB. Gamma radiationC. FissionD. Quantum mechanicsHow many pairs of chromosomes are contained within a typical cell in the human body?A. 2B. 16C. 23D. 64Which of the following has the shortest wavelength?A. Red lightB. Violet lightC. UV radiationD. Infrared radiationAn atom that is made up of 1 proton, 1 neutron, and 2 electrons would be classified as what?A. BalancedB. A positive ionC. A negative ionD. An isotope39. What is the key element needed for a fern to reproduce?A. A male pollen carrierB. Abundant lightC. Robust seedsD. MoistureWhich of the following bodies of water would be most likely to have the lowest salinity level?A. The Indian OceanB. The Baltic SeaC. The Chesapeake BayD. The Colorado RiverThe concept of plate tectonics describes the large scale motions of which of the following?A. The Earth's biosphereB. The Earth's lithosphereC. The Earth's hydrosphereD. The Earth's atmosphereWhich of the following best explains why a person cannot drink sea water?A. Sea water contains a naturally occurring set of toxins which can be processed by fish and other aquatic organisms, but which cannot be processed by the human kidneys.B. The high salinity of sea water causes a harmful imbalance between the naturally occurring salt in the human body and other minerals such as sodium, potassium, and calcium.C. Highly developed taste receptors using ion channels become over-stimulated by salt in the seawater and can cause neurological problems if excess consumption occurs.D. The high salinity of sea water causes tissues to become dehydrated due to the osmotic diffusion of water from within the cells.According to Kepler's First Law of Planetary motion the orbit of every planet is what?A. CircularB. RelativeC. EllipticalD. OrbitalWhich of the following scenarios is likely to produce the most extreme tides?A. The Moon and the Sun's gravitational pull on the Earth when they are in alignment.B. The Moon and the Sun's gravitational pull on the Earth from perpendicular angles.C. The Moon's gravitational pull on the Earth when the two bodies are closest.D. The Moon's gravitational pull on the Earth when the two bodies are furthest apart.Which of the following would be considered a scientific career?A. ArcheologistB. DoctorC. PhysicistD. All of the aboveWhich of the following pairs of organisms provides the best example of commensalism?A. Barnacles adhering to the shell of a molluskB. Fleas living on the skin of a dogC. A clownfish feeding on small invertebrates that could potentially harm a sea anemone, while the stinging tentacles of the anemone provide the clownfish with protection from predatorsD. A hyena feeding on a slain antelope carcassWhich of the following would not necessarily contribute to the reduction of uncertainty when investigating a scientific phenomenon?A. The development of knowledge about related factors.B. A new hypothesis.C. Better and more observations.D. Better explanatory models.
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