Answer the following question given this paragraph: Bronze, an alloy of copper and tin, has been in use since ancient times. The Bronze Age saw the increased use of metals rather than stone for weapons, tools, and decorative objects. Brass, an alloy of copper and zinc, is widely used in musical instruments like the trumpet and trombone. Q: What is an alloy of copper and tin? Choices: - zinc - gold - silver - bronze A:
bronze
(Question)
Answer the following question given this paragraph: The strength of a base depends on how many hydroxide ions it produces when it dissolves in water. A stronger base produces more hydroxide ions than a weaker base. For example, sodium hydroxide (NaOH), a base in drain cleaner, is a strong base because all of it breaks down into ions when it dissolves in water. Calcium carbonate (CaCO 3 ), a base in antacids, is a weak base because only a small percentage of it breaks down into ions in water. Q: What determines the strength of a base when dissolved in water? Choices: - amount of phosphorus ions produced - pH level - saline content - amount of hydroxide ions produced A:
(Answer)
amount of hydroxide ions produced
Ques: Answer the following question given this paragraph: Bones look tough, shiny, and white because they are covered by a layer called the periosteum . Many bones also contain a soft connective tissue called bone marrow in the pores of the spongy bone. Bone marrow is where blood cells are made. Q: What layer covers the bones that make them look tough, shiny, and white? Choices: - epithelium - cuticle - epidermis - periosteum A:
Ans: periosteum
(Q).
Answer the following question given this paragraph: Mollusks have ventral nerve cords. The tissue beneath the shell is called the mantle. The mantle cavity contains hemolymph. Figure 15.33 Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. In vertebrate fishes, the pharyngeal slits become the gills. Humans are not chordates because humans do not have a tail. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column. Q: What is the tissue beneath a mollusks' shell called? Choices: - cartilage - skin - mucous - mantle A:
(A).
mantle
Ques:Answer the following question given this paragraph: Particulates cause lung diseases. They can also increase the risk of heart disease and the number of asthma attacks. Particulates block sunlight from reaching Earth's surface. This means there is less energy for photosynthesis. Less photosynthesis means that plants and phytoplankton produce less food. This affects whole ecosystems. Q: Particulates cause lung diseases. they can also increase the risk of heart disease and the number of what? Choices: - coughing - cancer - shortness of breath - asthma attacks A:

Ans:asthma attacks
Ques:Answer the following question given this paragraph: transient males. Since these loyal males already bond and cooperate with females, it may well be a simple matter for them to bond and cooperate with each other. In a semi-counter intuitive manner, the ability to bond with males could be selected for based on its effect on reproductive success with females. On the other hand, a male that commits himself to a cooperative (loyal and exclusive) arrangement with a female necessarily limits his interactions One of the most robust and reliable findings in with other females. This implies that he will attempt to insure the scientific literature on interpersonal that the offspring he is raising are genetically related to him. attraction is the overwhelming role played by physical attractiveness in defining the ideal Of course, another possibility is that a loyal male may be romantic partner (Hatfield & Sprecher, 1986; attractive to multiple females, who in turn compete for his Jackson, 1992). Both men and women express attention and loyalty. Clearly the outcome of such interactions marked preference for an attractive partner in a is influenced by how many females can the male effectively non- committed short-term (casual, one night stand) relationship (Buss & Schmitt, 1993). protect (that is, improve their reproductive success). The situation quickly gets complex and many competing strategies are possible. Different species make different choices depending upon their evolutionary history and environmental constraints. As we noted above, secondary sexual characteristics, that is, traits that vary dramatically between the two sexes, serve to advertise various traits, including heath, loyalty, robustness, and fertility. The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of health.192 The tail of the male peacock is a common example, a male either has large, colorful and symmetrical tail, all signs of a health or it does not there is little room for ambiguity. These predictions have been confirmed... Q: The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of what? Choices: - society - problem - need - health A:

Ans:
health