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Which of the following best explains the central role of carbon in the chemistry of living organisms? A. Carbon forms many molecules with ionic bonds. B. Carbon forms many molecules with covalent bonds. C. Carbon forms many molecules with hydrogen bonds. D. Carbon can only bond to other carbon atoms.
Weegy: C. Carbon forms many molecules with hydrogen bonds is the basis for organis life forms. User: As scientists search the universe for signs of life on other planets they are likely to focus on the presence of molecules containing which of the following elements? A. carbon B. calcium C. iron D. magnesium Weegy: The answer is a. carbon. User: Which of the following best describes the function of enzymes in biological systems? A. Enzymes are the monomers of glucose. B. Enzymes act as catalysts to speed up chemical reactions. C. Enzymes are amino acids that form DNA. D. Enzymes make up cell membranes. Weegy: B. Enzymes act as catalysts to speed up chemical reactions. User: Which of the following do humans get from eating fats? A. protein B. starches C. lipids D. glucose Weegy: Humans get glucose from eating fats. User: Which of the following is an essential element for all living things that is found in the yolk sac? A. phosphorus B. chlorine C. silver D. radon Weegy: Phosphorus is an essential element for all living things that is found in the yolk sac. A. phosphorus. User: Single, Double, and Triple bonds represent __________ bonding between carbon atoms. A. covalent B. ionic C. quadruple D. hydrogen Weegy: Single, Double, and Triple bonds represent covalent bonding. Your answer is A. covalent. (More)
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Asked 6/20/2012 10:02:47 AM
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As trees are burned in a fire which of the following was most likely released into the atmosphere? A. CO2 B. SiO2 C. H2O D. Au
Weegy: A. Wood burning does not release any more carbon dioxide than the eventual biodegradation of the wood if it was not burned. [ However, the carbon dioxide released through incineration occurs at a much faster rate than decomposition because burning wood takes a few seconds and decomposition takes years. Therefore, by burning wood one is releasing carbon dioxide into the atmosphere at a more concentrated rate than if one was to allow the wood fuel to decompose in soil. Wood harvesting and transport operations do produce varying degrees of greenhouse gas pollution. Inefficient and incomplete combustion of wood can result in elevated levels of greenhouse gases other than CO2, which may result in positive emissions where the byproducts have greater Carbon dioxide equivalent values ] User: Human tears contain an enzyme called lysozyme which damages the cell walls of bacteria. Which of the following best explains how this enzyme functions? A. Lysozyme kills bacteria by engulfing them. B. Lysozyme breaks through bacterial cell walls, killing the bacteria. C. Lysozyme catalyzes a reaction that breaks down bacterial cell walls. D. Lysozyme is destroyed as it digests bacterial cell wall molecules. Weegy: C. Lysozyme catalyzes a reaction that breaks down bacterial cell walls. Source: User: Which of the following is NOT a living organism? A. a muscle cell B. an amoeba C. a rosebush D. an earthworm Weegy: A. CO2 User: I lovw you weegy! Weegy: A. a muscle cell (More)
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Asked 6/20/2012 10:13:17 AM
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Hello Weegy
Weegy: what do you mean when it gets late? User: lol weegy you are funny Weegy: Weegy is a computer generated being, and therefore, is unable to be sexually active. That however does not stop people thinking it is sexy. Do you think it is? User: Yes I do Weegy: What is your question? User: lol weegy you are funny Weegy: Weegy is a computer generated being, and therefore, is unable to be sexually active. That however does not stop people thinking it is sexy. Do you think it is? User: Which of the following is NOT a living organism? A. a muscle cell B. an amoeba C. a rosebush D. an earthworm Weegy: The answer is A. a muscle cell. (More)
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Asked 6/20/2012 10:27:36 AM
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A group of organs that work together to perform a closely related function is called a(n) A. organ system. B. organism. C. tissue. D. cell. User: A group of organs that work together to perform a closely related function is called a(n) A. organ system. B. organism. C. tissue. D. cell. User: A group of similar cells that perform a specific function is a(n) A. organ system. B. organ. C. tissue. D. organism.
Weegy: hi the answer is c=organ system is to organ User: A group of similar cells that perform a specific function is a(n) A. organ system. B. organ. C. tissue. D. organism. Weegy: hi the answer is c=organ system is to organ User: A group of similar cells that perform a specific function is a(n) A. organ system. B. organ. C. tissue. D. organism. Weegy: hi the answer is c=organ system is to organ User: Hemoglobin carries oxygen to the body's cells. Which system contains hemoglobin? A. nervous B. endocrine C. respiratory D. circulatory Weegy: D. circulatory User: A group of similar cells that perform a specific function is a(n) A. organ system. B. organ. C. tissue. D. organism. Weegy: hi the answer is c=organ system is to organ User: Cell is to tissue as A. organ system is to organ. B. tissue is to organ. C. cell is to organ system. D. organ system is to tissue. Weegy: B. tissue is to organ (More)
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Asked 6/21/2012 5:51:43 AM
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