Ques: Answer the following question given this paragraph: In some ways, a collection of gas molecules represents the simplest form of matter. Because the individual molecules are so far apart, they have only fleeting interactions with one another. In contrast, molecules that have clustered together to form a liquid or solid are constantly exerting forces on each other. In fact, it is only because of these attractive forces that molecular solids and liquids exist at all. In this lesson, we will look at some of the ways in which molecules and ions attract one another to form solids and liquids. Q: In some ways, a collection of gas molecules represents the simplest form of what? Choices: - life - energy - protein - matter A:
Ans: matter

Ques: Answer the following question given this paragraph: Colonial organisms were probably one of the first evolutionary steps towards multicellular organisms. Algae of the genus Volvox are an example of the bridge between colonial organisms and multicellular organisms. Each Volvox , shown in Figure above , is a colonial organism. It is made of up to 50,000 photosynthetic flagellate algae that are grouped together into a hollow sphere. Volvox live in a variety of freshwater habitats, and were first reported by Antonie van Leeuwenhoek in 1700. Q: Colonial organisms were probably one of the first evolutionary steps towards which type of organisms? Choices: - double cellular - mutated - fetus - multicellular A:
Ans: multicellular

Ques: Answer the following question given this paragraph: 11.2 Mechanisms of Evolution There are four factors that can change the allele frequencies of a population. Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities. Mutations introduce new alleles into a population. Genetic drift stems from the chance occurrence that some individuals have more offspring than others and results in changes in allele frequencies that are random in direction. When individuals leave or join the population, allele frequencies can change as a result of gene flow. Q: Out of the four ways that allele frequencies of a population can be changed, which way is caused by individuals leaving or joining the population? Choices: - Allopatric speciation - spontaneous mutation - mass extinction - gene flow A:
Ans: gene flow

Ques: Answer the following question given this paragraph: An alkaline battery is a variation on the zinc-carbon dry cell. The alkaline battery has no carbon rod and uses a paste of zinc metal and potassium hydroxide instead of a solid metal anode. The cathode half-reaction is the same, but the anode half-reaction is different. Q: Deficiency of what is symptomized by nausea, fatigue and dizziness, and can be triggered by excessive sweating? Choices: - impurities - salts - calories - electrolytes A:
Ans:
electrolytes