Answer the following question given this paragraph: Evolution occurs as organisms acquire and pass on new traits from one generation to the next generation. Its occurrence over large stretches of time explains the origin of new species and the great diversity of the biological world. Extant species are related to each other through common descent, and products of evolution over billions of years. Analysis of the DNA of different organisms indicates there is a similarity among very different organisms in the genetic code that help make proteins and other molecules. This genetic code is used by all known forms of life on Earth. The theory of evolution suggests that the genetic code was established very early in the history of life, and some studies suggest it was established soon after the formation of Earth. The timeline of the evolution of life, shown in Figure below , outlines the major events in the development of life. Q: What occurs when organisms acquire and pass on new traits from one generation to the next generation? Choices: - variation - birth - phenomenon - evolution A:
evolution
(Question)
Answer the following question given this paragraph: In the modern periodic table, each element is represented by its chemical symbol. The number above each symbol is its atomic number. Atomic numbers increase from left to right and from top to bottom in the table. Q: What is denoted by the number above the chemical symbol of each element in a modern periodic table? Choices: - metallic number - atomic weight - electron count - atomic number A:
(Answer)
atomic number
Ques: Answer the following question given this paragraph: The muscular system consists of all the muscles of the body. Does the word muscle make you think of the bulging biceps of a weightlifter, like the man in Figure below ? Muscles such as biceps that move the body are easy to feel and see, but they aren't the only muscles in the human body. Many muscles are deep within the body. They form the walls of internal organs such as the heart and stomach. You can flex your biceps like a body builder but you cannot control the muscles inside you. It's a good thing that they work on their own without any conscious effort your part, because movement of these muscles is essential for survival. Q: What system consists of all the muscles of the body? Choices: - vascular - digestive - endocrine - muscular A:
Ans: muscular
(Q).
Answer the following question given this paragraph: Nuclear power is a controversial subject in California and most other places. Nuclear power has no pollutants including no carbon emissions. However, power plants are not always safe. The long-term disposal of wastes is a problem that has not yet been solved. The future of nuclear power is murky. Find out more at: http://science. kqed. org/quest/audio/new-nuclear/. Q: What kind of power does not produce any pollutants, but produces waste that can be difficult to dispose of? Choices: - electrical - biofuel - solar - nuclear A:
(A).
nuclear
Ques:Answer the following question given this paragraph: Amines are bases; they react with acids to form salts. Q: Amines are bases; they react with acids to form what? Choices: - oils - ions - proteins - salts A:

Ans:salts
Ques: Answer the following question given this paragraph: Polysaccharides A long chain of monosaccharides linked by glycosidic bonds is known as a polysaccharide (poly- = "many"). The chain may be branched or unbranched, and it may contain different types of monosaccharides. The molecular weight may be 100,000 daltons or more depending on the number of monomers joined. Starch, glycogen, cellulose, and chitin are primary examples of polysaccharides. Starch is the stored form of sugars in plants and is made up of a mixture of amylose and amylopectin (both polymers of glucose). Plants are able to synthesize glucose, and the excess glucose, beyond the plant's immediate energy needs, is stored as starch in different plant parts, including roots and seeds. The starch in the seeds provides food for the embryo as it germinates and can also act as a source of food for humans and animals. The starch that is consumed by humans is broken down by enzymes, such as salivary amylases, into smaller molecules, such as maltose and glucose. The cells can then absorb the glucose. Starch is made up of glucose monomers that are joined by 1-4 or 1-6 glycosidic bonds. The numbers 1-4 and 1-6 refer to the carbon number of the two residues that have joined to form the bond. As illustrated in Figure 3.9, amylose is starch formed by unbranched chains of glucose monomers (only 1-4 linkages), whereas amylopectin is a branched polysaccharide ( 1-6 linkages at the branch points). Q: A long chain of monosaccharides linked by glycosidic bonds is known as what? Choices: - sulfate - Fructose - polymers - polysaccharide A:
Ans:
polysaccharide