Which organic compound comprises the membrane that surrounds and defines a cell? amino acid false nucleic acid false sterol false phospholipid true Single Which of the following celestial bodies has been discovered to be abundant in organic compounds? Venus false Mars false Europa false Titan true Single The chemosynthesis reactions that occur and provide energy to organisms at the bottom of the ocean is powered by which energy source? The electricity carried by salt ions in seawater false The small amount of light from the sun that reaches the seafloor false The waste products of organisms dwelling at the upper parts of the sea false The heat flowing from hydrothermal vents true Single Which is the reason behind water's ability to dissolve a wide variety of substances? It has strong cohesion but not adhesion false It has strong adhesion but not cohesion false It has strong adhesion and cohesion false Its molecule has a polar geometry true Single Why can water only exist as a gas on Mars' surface? Its atmospheric pressure is too low false Its temperature is too low false Both its temperature and atmospheric pressure is low true Mars' atmosphere contains only low amounts of water vapor false Single Which of the following celestial bodies has a thick atmosphere? Mercury false Europa false Titan true Charon false Single Which of the following is an adverse effect of solar wind? Solar wind strips away the atmospheres of celestial bodies over time true Solar wind can induce combustion in oxygen-rich atmospheres false Solar wind can penetrate and weaken a planet's magnetosphere false Solar wind can speed up global warming false Single Which process has enabled the Earth's atmosphere to have a steady supply of gases since its formation and differentiation? Volcanic outgassing true Evaporation of seawater false Respiration by the biosphere false Spontaneous fission of gasesous isotopes within the atmosphere false Single The magnetosphere of the Earth is produced by which process? The rotation of the outer core true The radioactive decay of the atmosphere false The combined magnetism of all of Earth's rocks false The recycling of the tectonic plates false Single Which of the following is not a requirement for all life forms to exist? oxygen true organic material false water false energy false Single