Question: Answer the following question given this paragraph:   Ionic bonds are possible because the elements involved have either donated or accepted one or more electrons. Sodium chloride is formed when each sodium atom donates its single valence electron to a chlorine atom. As a result, both ions have a noble gas configuration, and an attraction is formed between the positive sodium ions and the negative chloride ions.   Q: What  is formed when each sodium atom donates its single valence electron to a chlorine atom?   Choices:  - carbon chloride  - nitrogen chloride  - trioxide chloride  - sodium chloride  A:
sodium chloride


(Question)
Answer the following question given this paragraph:   The lifecycle of basidiomycetes includes alternation of generations (Figure 24.16). Spores are generally produced through sexual reproduction, rather than asexual reproduction. The club-shaped basidium carries spores called basidiospores. In the basidium, nuclei of two different mating strains fuse (karyogamy), giving rise to a diploid zygote that then undergoes meiosis. The haploid nuclei migrate into basidiospores, which germinate and generate monokaryotic hyphae. The mycelium that results is called a primary mycelium. Mycelia of different mating strains can combine and produce a secondary mycelium that contains haploid nuclei of two different mating strains. This is the dikaryotic stage of the basidiomyces lifecyle and and it is the dominant stage. Eventually, the secondary mycelium generates a basidiocarp, which is a fruiting body that protrudes from the ground—this is what we think of as a mushroom. The basidiocarp bears the developing basidia on the gills under its cap.   Q: Spores are generally produced through what type of reproduction?   Choices:  - similar  - asexual  - hormone  - sexual  A:
(Answer)
sexual


Ques: Answer the following question given this paragraph:   Salts Recall that salts are formed when ions form ionic bonds. In these reactions, one atom gives up one or more electrons, and thus becomes positively charged, whereas the other accepts one or more electrons and becomes negatively charged. You can now define a salt as a substance that, when dissolved in water, dissociates into ions other than H+ or OH–. This fact is important in distinguishing salts from acids and bases, discussed next. A typical salt, NaCl, dissociates completely in water (Figure 2.15). The positive and negative regions on the water molecule (the hydrogen and oxygen ends respectively) attract the negative chloride and positive sodium ions, pulling them away from each other. Again, whereas nonpolar and polar covalently bonded compounds break apart into molecules in solution, salts dissociate into ions. These ions are electrolytes; they are capable of conducting an electrical current in solution. This property is critical to the function of ions in transmitting nerve impulses and prompting muscle contraction.   Q: What substances, which are distinct from acids and bases, form when ions form ionic bonds?   Choices:  - oils  - vitamins  - water molecules  - salts  A:
Ans: salts


(Q).
Answer the following question given this paragraph:   Although most of a cell's DNA is contained in the cell nucleus, mitochondria have their own DNA. Mitochondria also have the machinery to manufacture their own RNAs and proteins. The human mitochondrial DNA sequence has 16,569 base pairs encoding 37 total genes: 22 tRNA genes, 2 rRNA genes, and 13 peptide genes. The 13 mitochondrial peptides in humans are integrated into the inner mitochondrial membrane, along with proteins encoded by nuclear genes.   Q: Where is most of the cell's dna contained?   Choices:  - vacuole  - epidermis  - cell membrane  - nucleus  A:
(A).
nucleus


Ques:Answer the following question given this paragraph:   Some materials are natural permanent magnets. The most magnetic material in nature is the mineral magnetite, also called lodestone (see Figure below ). The magnetic domains of magnetite naturally align with Earth’s axis. The picture on the left shows a chunk of magnetite attracting small bits of iron. The magnetite spoon compass shown on the right dates back about 2000 years and comes from China. The handle of the spoon always points north. Clearly, the magnetic properties of magnetite have been recognized for thousands of years.   Q: Also called lodestone, the mineral magnetite is the most powerful what?   Choices:  - material on Earth  - synthetic magnet  - healing magnet  - natural permanent magnet  A:

Ans:natural permanent magnet


Ques: Answer the following question given this paragraph:   Dimensional analysis can be used to carry out metric unit conversions.   Q: What is used to carry out metric unit conversions?   Choices:  - mechanical analysis  - metric analysis  - calculation analysis  - dimensional analysis  A:
Ans:
Answer: dimensional analysis