Answer the following question given this paragraph: When appropriate, a symbol may be written above or below the arrow to indicate some special circumstance. The symbol "" is often used to indicate that the reaction is to be heated. Q: Which enzyme is used in step three of the polymerase chain reaction because of it's ability to withstand high temperatures? Choices: - minocycline polymerase - carbon polumerase - backronym polymerase - taq polymerase A:
taq polymerase
(Question)
Answer the following question given this paragraph: 15.11 Amines: Structures and Names LEARNING OBJECTIVES Identify the general structure for an amine. Identify the functional group for amines. Determine the structural feature that classifies amines as primary, secondary, or tertiary. Use nomenclature systems to name amines. Amines are classified according to the number of carbon atoms bonded directly to the nitrogen atom. A primary (1) amine has one alkyl (or aryl) group on the nitrogen atom, a secondary (2) amine has two, and a tertiary (3) amine has three (http://catalog. flatworldknowledge. com/bookhub/reader/2547. Q: Amines are classified according to the number of carbon atoms bonded directly to what atom? Choices: - helium - oxygen - hydrogen - nitrogen A:
(Answer)
nitrogen
Ques: Answer the following question given this paragraph: Crystalline solids are generally classified according the nature of the forces that hold its particles together. These forces are primarily responsible for the physical properties exhibited by the bulk solids. The following sections provide descriptions of the major types of crystalline solids: ionic, metallic, covalent network, and molecular. Q: What kind of solids are generally classified by the forces that hold their particles together and include ionic, metallic, covalent network, and molecular types? Choices: - distinct solids - helium solids - flat solids - crystalline solids A:
Ans: crystalline solids
(Q).
Answer the following question given this paragraph: An electromagnetic wave consists of vibrating electric and magnetic fields. Q: In addition to a vibrating electric field what does an electromagnetic wave consist of? Choices: - radiation field - molecular field - gravitational field - magnetic field A:
(A).
magnetic field
Ques:Answer the following question given this paragraph: 18.2 Formation of New Species Speciation occurs along two main pathways: geographic separation (allopatric speciation) and through mechanisms that occur within a shared habitat (sympatric speciation). Both pathways isolate a population reproductively in some form. Mechanisms of reproductive isolation act as barriers between closely related species, enabling them to diverge and exist as genetically independent species. Prezygotic barriers block reproduction prior to formation of a zygote, whereas postzygotic barriers block reproduction after fertilization occurs. For a new species to develop, something must cause a breach in the reproductive barriers. Sympatric speciation can occur through errors in meiosis that form gametes with extra chromosomes (polyploidy). Autopolyploidy occurs within a single species, whereas allopolyploidy occurs between closely related species. Q: Both pathways that isolate a population reproductively in some form, allopatric and sympatric describe what, which means the creation of new species? Choices: - accumulation - extinction - bacterial - speciation A:

Ans:speciation
Question: Answer the following question given this paragraph: A: Both boxes have the same volume because they are the same size. However, the books have greater mass than the feathers. Therefore, the box of books has greater density. Q: What third property is different if two boxes have the same volume but one has greater mass? Choices: - oxygen - output - diameter - density A:
Answer:
density