Q: Has the average annual temperature on earth been rising or falling for the past 100 years? Read this paragraph and choose the correct option from the provided answers: The average annual temperature on Earth has been rising for the past 100 years. Choices: - unchanged - fluctuating - falling - rising A:
rising
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Q: What group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared? Read this paragraph and choose the correct option from the provided answers: 22.1 | Prokaryotic Diversity By the end of this section, you will be able to: Describe the evolutionary history of prokaryotes Discuss the distinguishing features of extremophiles Explain why it is difficult to culture prokaryotes Prokaryotes are ubiquitous. They cover every imaginable surface where there is sufficient moisture, and they live on and inside of other living things. In the typical human body, prokaryotic cells outnumber human body cells by about ten to one. They comprise the majority of living things in all ecosystems. Some prokaryotes thrive in environments that are inhospitable for most living things. Prokaryotes recycle nutrientsessential substances (such as carbon and nitrogen)and they drive the evolution of new ecosystems, some of which are natural and others man-made. Prokaryotes have been on Earth since long before multicellular life appeared. Choices: - bacteria - protists - eukaryotes - prokaryotes A:
prokaryotes
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Q: Where does the earth gets its energy from? Read this paragraph and choose the correct option from the provided answers: Earth gets its energy from the Sun. The Sun gives off photons of energy that travel in waves. All the wavelengths of the Sun's energy make up the electromagnetic (EM) spectrum. Choices: - decomposers - precipitation - heat - sun A:
sun
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Q: A heterogeneous mixture of particles of one substance distributed throughout a second substance in a different phase is known as what? Read this paragraph and choose the correct option from the provided answers: Summary A suspension is a heterogeneous mixture of particles of one substance distributed throughout a second phase; the dispersed particles separate from the dispersing phase on standing. In contrast, the particles in a colloid are smaller and do not separate on standing. A colloid can be classified as a sol, a dispersion of solid particles in a liquid or solid; a gel, a semisolid sol in which all of the liquid phase has been absorbed by the solid particles; an aerosol, a dispersion of solid or liquid particles in a gas; or an emulsion, a dispersion of one liquid phase in another. A colloid can be distinguished from a true solution by its ability to scatter a beam of light, known as the Tyndall effect. Hydrophilic colloids contain an outer shell of groups that interact favorably with water, whereas hydrophobic colloids have an outer surface with little affinity for water. Emulsions are prepared by dispersing a hydrophobic liquid in water. In the absence of a dispersed hydrophobic liquid phase, solutions of detergents in water form organized spherical aggregates calledmicelles. Phospholipids are a class of detergent-like molecules that have two Saylor URL: http://www. saylor. org/books. Choices: - disruption - solution - fluid - suspension A:
suspension
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