Answer the following question given this paragraph: Q: What three forces are involved in erosion? Choices: - water, temperature, altitude - heat, pressure, gravity - radiation, gravity, precipitation - water, wind, gravity A:
water, wind, gravity
(Question)
Answer the following question given this paragraph: Electrons fill orbitals in a consistent order: they first fill the orbitals closest to the nucleus, then they continue to fill orbitals of increasing energy further from the nucleus. If there are multiple orbitals of equal energy, they will be filled with one electron in each energy level before a second electron is added. The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms to form molecules. Under standard conditions, atoms fill the inner shells first, often resulting in a variable number of electrons in the outermost shell. The innermost shell has a maximum of two electrons but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states, with the exception of the innermost shell, that atoms are more stable energetically when they have eight electrons in their valence shell, the outermost electron shell. Examples of some neutral atoms and their electron configurations are shown in Figure 2.7. Notice that in this Figure 2.7, helium has a complete outer electron shell, with two electrons filling its first and only shell. Similarly, neon has a complete outer 2n shell containing eight electrons. In contrast, chlorine and sodium have seven and one in their outer shells, respectively, but theoretically they would be more energetically stable if they followed the octet rule and had eight. Q: Which orbitals do electrons fill first? Choices: - empty orbitals - charged orbitals - furthest from nucleus - closest to the nucleus A:
(Answer)
closest to the nucleus
Ques: Answer the following question given this paragraph: Q: What is the most common pattern of dispersion? Choices: - random - uniform - sporadic - clumped A:
Ans: clumped
(Q).
Answer the following question given this paragraph: Proteins play many important roles in living things. Some proteins help cells keep their shape, and some make up muscle tissues. Many proteins speed up chemical reactions in cells. Other proteins are antibodies, which bind to foreign substances such as bacteria and target them for destruction. Still other proteins carry messages or materials. For example, human red blood cells contain a protein called hemoglobin, which binds with oxygen. Hemoglobin allows the blood to carry oxygen from the lungs to cells throughout the body. A model of the hemoglobin molecule is shown in Figure below . Q: What type of proteins bind to foreign substances and attempt destruction? Choices: - membranes - ribosomes - antigens - antibodies A:
(A).
antibodies
Ques:Answer the following question given this paragraph: The nuclei of radioisotopes are unstable, so they constantly decay and emit radiation. Q: The nuclei of radioisotopes are unstable, so they constantly decay and emit what? Choices: - moisture - acid - chemicals - radiation A:

Ans:radiation
Question: Answer the following question given this paragraph: Types of Root Systems Root systems are mainly of two types (Figure 30.15). Dicots have a tap root system, while monocots have a fibrous root system. A tap root system has a main root that grows down vertically, and from which many smaller lateral roots arise. Dandelions are a good example; their tap roots usually break off when trying to pull these weeds, and they can regrow another shoot from the remaining root). A tap root system penetrates deep into the soil. In contrast, a fibrous root system is located closer to the soil surface, and forms a dense network of roots that also helps prevent soil erosion (lawn grasses are a good example, as are wheat, rice, and corn). Some plants have a combination of tap roots and fibrous roots. Plants that grow in dry areas often have deep root systems, whereas plants growing in areas with abundant water are likely to have shallower root systems. Q: Root systems are mainly of two types. dicots have a tap root system, while monocots have a what? Choices: - long root system - runner root system - attaching root system - fibrous root system A:
Answer:
fibrous root system