Ques:Q: What are the three types of symbiosis? Read this paragraph and choose the correct option from the provided answers: Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be beneficial, harmful, or neutral. There are three types of symbiosis: mutualism, parasitism, and commensalism. Choices: - connectionism , parasitism , commensalism - commensalism, osmosis, internalization - internalization , parasitism , commensalism - mutualism, parasitism, commensalism A:

Ans:mutualism, parasitism, commensalism
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Ques:Q: In physics, resistance is opposition to the flow of what? Read this paragraph and choose the correct option from the provided answers: In physics, resistance is opposition to the flow of electric charges in an electric current as it travels through matter. The SI unit for resistance is the ohm. Resistance occurs because moving electrons in current bump into atoms of matter. Resistance reduces the amount of electrical energy that is transferred through matter. That's because some of the electrical energy is absorbed by the atoms and changed to other forms of energy, such as heat. You can see an animation of resistance at the level of atoms and electrons at this URL: http://www. physics. org/explorelink. asp?id=1738&q=electricalresistance&currentpage=1&age=0&knowledge=0&item=3. Choices: - temperature charges - capacitance - surface flow - electrical charges A:

Ans:electrical charges
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Ques:Q: What orbits an atoms' nucleus? Read this paragraph and choose the correct option from the provided answers: An atom has negatively-charged electrons in orbit around its nucleus. Choices: - neutrally charged ions - positively charged protons - isotopes - negatively charged electrons A:

Ans:negatively charged electrons
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Ques:Q: What two things are used in optical instruments to reflect or refract light? Read this paragraph and choose the correct option from the provided answers: Mirrors and lenses are used in optical instruments to reflect or refract light. Optical instruments include microscopes, telescopes, cameras, and lasers. Choices: - orientations and lenses - mirrors and magnifiers - prisms and microscopes - mirrors and lenses A:

Ans:
mirrors and lenses
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