Answer the following question given this paragraph: An electric circuit consists of at least one closed loop through which electric current can flow. Every circuit has a voltage source such as a battery and a conductor such as metal wire. A circuit may have other parts as well, such as lights and switches. In addition, a circuit may consist of one loop or two loops. Q: What is the minimum number of loops a circuit can have? Choices: - 3 - .1 - 2 - 1 A:
1
Answer the following question given this paragraph: Methane has a three-dimensional, tetrahedral structure. Q: What structure does methane have? Choices: - two dimensional oxyhedra - two dimensional tetrahedra - three dimensional oxyhedra - three dimensional tetrahedra A:
three dimensional tetrahedra
Q: Answer the following question given this paragraph: Animals may eat and drink at certain times of day as well. Humans have daily cycles of behavior, too. Most people start to get sleepy after dark and have a hard time sleeping when it is light outside. Daily cycles of behavior are called circadian rhythms . Q: What is the term for daily cycles of behavior, like the sleep-wake cycle? Choices: - daily rhythms - variable rhythms - behavioral rhythms - circadian rhythms A:
A: circadian rhythms
Question: Answer the following question given this paragraph: tobacco smoke causes fatal lung disease in nonsmokers. Q: What still causes fatal lung disease in nonsmokers? Choices: - nicotine - chewing tobacco - alcohol - tobacco smoke A:
Answer: tobacco smoke
*Question*
Answer the following question given this paragraph: When wood burns, it changes to ashes, carbon dioxide, water vapor, and other gases. You can see ashes in the wood fire pictured here. The gases are invisible. Q: What is the primary gas produced from burning of wood? Choices: - liquid dioxide - Hydrogen Dioxide - toxic dioxide - carbon dioxide A:
**Answer**
carbon dioxide
Answer the following question given this paragraph: Characteristics of Amniotes The amniotic egg is the key characteristic of amniotes. In amniotes that lay eggs, the shell of the egg provides protection for the developing embryo while being permeable enough to allow for the exchange of carbon dioxide and oxygen. The albumin, or egg white, provides the embryo with water and protein, whereas the fattier egg yolk is the energy supply for the embryo, as is the case with the eggs of many other animals, such as amphibians. However, the eggs of amniotes contain three additional extra-embryonic membranes: the chorion, amnion, and allantois (Figure 29.20). Extra-embryonic membranes are membranes present in amniotic eggs that are not a part of the body of the developing embryo. While the inner amniotic membrane surrounds the embryo itself, the chorion surrounds the embryo and yolk sac. The chorion facilitates exchange of oxygen and carbon dioxide between the embryo and the egg's external environment. The amnion protects the embryo from mechanical shock and supports hydration. The allantois stores nitrogenous wastes produced by the embryo and also facilitates respiration. In mammals, membranes that are homologous to the extra-embryonic membranes in eggs are present in the placenta. Q: In amniotes that lay eggs, the shell of the egg provides protection for the developing embryo while being permeable enough to allow for the exchange of carbon dioxide and this? Choices: - gas - tissue - Protein - oxygen A:
oxygen