Answer the following question given this paragraph: The population growth rate is how quickly a population changes in size over time. The rate of growth of a population may be positive or negative. A positive growth rate means that the population is increasing in size because more people are being added than lost. A negative growth rate means that the population is decreasing in size because more people are being lost than added. Q: How quickly a population changes in size over time is known as what? Choices: - population impact rate - population multiplication rate - population direction rate - population growth rate A:
population growth rate
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Answer the following question given this paragraph: Color, temperature, and solubility are examples of intensive properties. Q: Color, temperature, and solubility are examples of what type of property? Choices: - severe - minimal - susceptible - intensive A:
intensive
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Answer the following question given this paragraph: Most fungi are multicellular, but some exist as single cells. Single-celled fungi are known as yeasts. Fungi spend most of their life cycle in the haploid state. They form diploid cells only during sexual reproduction. Like the cells of protists and plants, the cells of fungi have cell walls. But fungi are unique in having cell walls made of chitin instead of cellulose. Chitin is a tough carbohydrate that also makes up the exoskeleton (outer skeleton) of insects and related organisms. Q: What is the common term for single-celled fungi? Choices: - sponges - mushrooms - prokaryotes - yeasts A:
yeasts
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Answer the following question given this paragraph: Summary A minimum energy (activation energy, Ea) is required for a collision between molecules to result in a chemical reaction. Plots of potential energy for a system versus the reaction coordinate show an energy barrier that must be overcome for the reaction to occur. The arrangement of atoms at the highest point of this barrier is the activated complex, or transition state, of the reaction. At a given temperature, the higher the Ea, the slower the reaction. The fraction of orientations that result in a reaction is the steric factor. The frequency factor, steric factor, and activation energy are related to the rate constant in the Arrhenius equation: k = Ae - Ea / RT. A plot of the natural logarithm of k versus 1/T is a straight line with a slope of Ea/R. Saylor URL: http://www. saylor. org/books. Q: What term means the minimum energy required in order for a collision between molecules to result in a chemical reaction? Choices: - maximum energy - solar energy - depletion energy - activation energy A:
activation energy
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