Answer the following question given this paragraph: The sub-energy levels are identified by the azimuthal quantum number, . Q: What are identified by the azimuthal quantum number? Choices: - ionic-energy level - covalent bonds - radioactivity - energy levels - sub-energy levels A:
sub-energy levels
(Question)
Answer the following question given this paragraph: Scientists classify living things to make sense of biodiversity and who how living things are related. The science of classifying living things is called taxonomy. Q: What is the science of classifying living things is called? Choices: - entomology - methodology - physiology - taxonomy A:
(Answer)
taxonomy
Ques: Answer the following question given this paragraph: The name of a monatomic cation is simply the name of the element followed by the word ion. Thus, Na+ is the sodium ion, Al3+ is the aluminum ion, Ca2+ is the calcium ion, and so forth. We have seen that some elements lose different numbers of electrons, producing ions of different charges (Figure 3.3 "Predicting Ionic Charges"). Iron, for example, can form two cations, each of which, when combined with the same anion, makes a different compound with unique physical and chemical properties. Thus, we need a different name for each iron ion to distinguish Fe2+ from Fe3+. The same issue arises for other ions with more than one possible charge. There are two ways to make this distinction. In the simpler, more modern approach, called the Stock system, an ion's positive charge is indicated by a roman numeral in parentheses after the element name, followed by the word ion. Thus, Fe2+ is called the iron(II) ion, while Fe3+ is called the iron(III) ion. This system is used only for elements that form more than one common positive ion. We do not call the Na+ ion the sodium(I) ion because (I) is unnecessary. Sodium forms only a 1+ ion, so there is no ambiguity about the name sodium ion. The second system, called the common system, is not conventional but is still prevalent and used in the health sciences. This system recognizes that many metals have two common cations. The common system uses two suffixes (-ic and -ous) that are appended to the stem of the element name. The -ic suffix represents the greater of the two cation charges, and the -ous suffix represents the lower one. In many cases, the stem of the element name comes from the Latin name of the element. Table 3.2 "The Common System of Cation Names" lists the elements that use the common system, along with their respective cation names. Table 3.2 The Common System of Cation Names. Q: The name of a monatomic cation is simply the name of the element followed by this word? Choices: - amine - laser - bond - ion A:
Ans: ion
(Q).
Answer the following question given this paragraph: The marsupial embryo is nourished inside the uterus with food from a yolk sac instead of through a placenta. The yolk sac stores enough food for the short period of time the embryo remains in the uterus. After the embryo is born, it moves into the mother's pouch, where it clings to a nipple. It remains inside the pouch for several months while it continues to grow and develop. Even after the offspring is big enough to leave the pouch, it may often return to the pouch for warmth and nourishment ( Figure below ). Eventually, the offspring is mature enough to remain outside the pouch on its own. Q: A yolk sac replaces what structure for nourishing a marsupial embryo? Choices: - uterus - glucose - Stomach - placenta A:
(A).
placenta
Ques:Answer the following question given this paragraph: Lymph that collects in tissues slowly passes into tiny lymph vessels. Lymph then travels from smaller to larger lymph vessels. Muscles around the lymph vessels contract and squeeze the lymph through the vessels. The lymph vessels also contract to help move the lymph along. Eventually, lymph reaches the main lymph vessels, which are located in the chest. From these vessels, lymph drains into two large veins of the cardiovascular system. This is how lymph returns to the blood. Q: Which part of the wave helps make the wave bend and cause refraction? Choices: - dense part - heavy part - bright part - shallow part A:

Ans:shallow part
Ques: Answer the following question given this paragraph: Figure 29.11 Hammerhead sharks tend to school during the day and hunt prey at night. (credit: Masashi Sugawara). Q: When do hammerhead sharks usually hunt? Choices: - summer - in the day - winter - at night A:
Ans:
at night