Answer the following question given this paragraph: VII *The convention of using roman numerals to indicate the oxidation states of a metal is used here. Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometries, such as FeO or FeS, but these compounds are usually cation deficient and almost never contain a 1:1 cation:anion ratio. Thus a substance such as ferrous oxide is actually a nonstoichiometric compound with a range of compositions. The acidbase character of transition-metal oxides depends strongly on the oxidation state of the metal and its ionic radius. Oxides of metals in lower oxidation states (less than or equal to +3) have significant ionic character and tend to be basic. Conversely, oxides of metals in higher oxidation states are more covalent and tend to be acidic, often dissolving in strong base to form oxoanions. Q: Binary transition-metal compounds, such as the oxides and sulfides, are usually written with idealized what? Choices: - speciation - fluctuations - noble gases - stoichiometries A:
stoichiometries
(Question)
Answer the following question given this paragraph: The dermis is the layer of skin directly under the epidermis. It is made of a tough connective tissue. The dermis contains hair follicles, sweat glands, oil glands, and blood vessels ( Figure above ). It also holds many nerve endings that give you your sense of touch, pressure, heat, and pain. Q: What layer of skin is directly under the epidermis? Choices: - the aponeurosis - hypodermis - sweat glands - the dermis A:
(Answer)
the dermis
Ques: Answer the following question given this paragraph: Emphysema is a disease in which the walls of the alveoli break down so less gas can be exchanged by the lungs. The main symptom of emphysema is shortness of breath. The damage to the alveoli is usually caused by smoking and is permanent. Q: What disease associated with smoking involves breakdown of walls of the alveoli, resulting in less gas exchange by the lungs? Choices: - leukemia - cancer - pneumonia - emphysema A:
Ans: emphysema
(Q).
Answer the following question given this paragraph: Valence electrons are the outer-shell electrons of an atom. Q: What are the outer-shell electrons of an atom called? Choices: - outer electrons - organism electrons - helium electrons - valence electrons A:
(A).
valence electrons
Ques:Answer the following question given this paragraph: Sedimentary rocks are very useful for determining the deformation history of an area. Q: What type of rocks are very useful for determining the deformation history of an area? Choices: - igneous - limestone - crystalline - sedimentary A:

Ans:sedimentary
Ques:Answer the following question given this paragraph: Platelets and Coagulation Factors Blood must clot to heal wounds and prevent excess blood loss. Small cell fragments called platelets (thrombocytes) are attracted to the wound site where they adhere by extending many projections and releasing their contents. These contents activate other platelets and also interact with other coagulation factors, which convert fibrinogen, a water-soluble protein present in blood serum into fibrin (a non-water soluble protein), causing the blood to clot. Many of the clotting factors require vitamin K to work, and vitamin K deficiency can lead to problems with blood clotting. Many platelets converge and stick together at the wound site forming a platelet plug (also called a fibrin clot), as illustrated in Figure 40.8b. The plug or clot lasts for a number of days and stops the loss of blood. Platelets are formed from the disintegration of larger cells called megakaryocytes, like that shown in Figure 40.8a. For each megakaryocyte, 20003000 platelets are formed with 150,000 to 400,000 platelets present in each cubic millimeter of blood. Each platelet is disc shaped and 24 m in diameter. They contain many small vesicles but do not contain a nucleus. Q: Thrombocytes are more commonly known by what name? Choices: - chromosomes - molecules - droplets - platelets A:

Ans:
platelets