Q: What is the term for a galaxy that is a rotating disk of stars and dust? Read this paragraph and choose the correct option from the provided answers: A spiral galaxy is a rotating disk of stars and dust. In the center is a dense bulge of material. Several spiral arms come out from the center. Spiral galaxies have lots of gas and dust and many young stars. The image below ( Figure below ) shows a spiral galaxy from the side. You can see the disk and central bulge. Choices: - cosmic galaxy - nebula - Milky Way - spiral galaxy A:
spiral galaxy

Q: Influenza is a type of what, where glycoproteins attach to a host epithelial cell? Read this paragraph and choose the correct option from the provided answers: Figure 17.6 In influenza virus infection, glycoproteins attach to a host epithelial cell. As a result, the virus is engulfed. RNA and proteins are made and assembled into new virions. Choices: - recent disease - nucleus disease - atoms disease - viral disease A:
viral disease

Q: Q: What is the second stage of cellular respiration? Read this paragraph and choose the correct option from the provided answers: The pyruvate molecules from glycolysis next enter the matrix of a mitochondrion. That's where the second stage of cellular respiration takes place. This stage is called the Krebs cycle . During this stage, two more molecules of ATP are produced. Other energy-storing molecules are also produced (to be used to make more ATP in stage 3). The Krebs cycle requires oxygen. Anything that needs oxygen is described as aerobic . The oxygen combines with the carbon from the pyruvate molecules. This forms carbon dioxide, a waste product. Choices: - beatnik cycle - duocycle - marr cycle - krebs cycle A:
A: krebs cycle

Question: Q: What kind of bonds are forces of attraction between positive metal ions and the valence electrons that are constantly moving around them? Read this paragraph and choose the correct option from the provided answers: Metallic bonds are forces of attraction between positive metal ions and the valence electrons that are constantly moving around them (see the Figure below ). The valence electrons include their own and those of other, nearby ions of the same metal. The valence electrons of metals move freely in this way because metals have relatively low electronegativity, or attraction to electrons. The positive metal ions form a lattice-like structure held together by all the metallic bonds. For an animated version of metallic bonding, go to this URL:. Choices: - neutron bonds - liquid bonds - ionized bonds - metallic bonds A:
Answer: metallic bonds

*Question*
Q: Acids are associated with a low number on which scale? Read this paragraph and choose the correct option from the provided answers: As indicated in http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gob-ch10_s04, weak acids are relatively common, even in the foods we eat. But we occasionally come across a strong acid or base, such as stomach acid, that has a strongly acidic pH of 12. By definition, strong acids and bases can produce a relatively large amount of hydrogen or hydroxide ions and, as a consequence, have a marked chemical activity. In addition, very small amounts of strong acids and bases can change the pH of a solution very quickly. If 1 mL of stomach acid [which we will approximate as 0.05 M HCl(aq)] is added to the bloodstream, and if no correcting mechanism is present, the pH of the blood would go from about 7.4 to about 4.9a pH that is not conducive to continued living. Fortunately, the body has a mechanism for minimizing such dramatic pH changes. The mechanism involves a buffer, a solution that resists dramatic changes in pH. Buffers do so by being composed of certain pairs of solutes: either a weak acid plus a salt derived from that weak acid or a weak base plus a salt of that weak base. For example, a buffer can be composed of dissolved acetic acid (HC2H3O2, a weak acid) and sodium acetate (NaC2H3O2, a salt derived from that acid). Another example of a buffer is a solution containing ammonia (NH3, a weak base) and ammonium chloride (NH4Cl, a salt derived from that base). Let us use an acetic acidsodium acetate buffer to demonstrate how buffers work. If a strong basea source of OH(aq) ionsis added to the buffer solution, those hydroxide ions will react with the acetic acid in an acid-base reaction: HC2H3O2(aq) + OH(aq) H2O() + C2H3O2(aq) Rather than changing the pH dramatically by making the solution basic, the added hydroxide ions react to make water, and the pH does not change much. Choices: - metric - acidic - ionic - ph A:
**Answer**
ph

(Q).
Q: Mitosis is nuclear division during which duplicated chromosomes are segregated and distributed into what? Read this paragraph and choose the correct option from the provided answers: Figure 6.3 A cell moves through a series of phases in an orderly manner. During interphase, G1 involves cell growth and protein synthesis, the S phase involves DNA replication and the replication of the centrosome, and G2 involves further growth and protein synthesis. The mitotic phase follows interphase. Mitosis is nuclear division during which duplicated chromosomes are segregated and distributed into daughter nuclei. Usually the cell will divide after mitosis in a process called cytokinesis in which the cytoplasm is divided and two daughter cells are formed. Choices: - father nuclei - long nuclei - woman nuclei - daughter nuclei A:
(A).
daughter nuclei