Q: What occurs when the immune system is not working properly? Read this paragraph and choose the correct option from the provided answers: Immunodeficiency occurs when the immune system is not working properly. As a result, it cannot fight off pathogens that a normal immune system would be able to resist. Rarely, the problem is caused by a defective gene. More often, it is acquired during a person's lifetime. Immunodeficiency may occur for a variety of reasons:. Choices: - allergy - cancer - anemia - immunodeficiency A:
immunodeficiency

Q: Physical and chemical properties of geometric isomers are generally what? Read this paragraph and choose the correct option from the provided answers: Physical and chemical properties of geometric isomers are generally different. While cis -2-butene is a polar molecule, trans -2-butene is nonpolar. Heat or irradiation with light can be used to bring about the conversion of one geometric isomer to another. The input of energy must be large enough to break the pi bond between the two carbon atoms, which is weaker than the sigma bond. At that point, the now single bond is free to rotate and the isomers can interconvert. Choices: - round - difficult - similar - different A:
different

Q: In which area does conduction mainly happen? Read this paragraph and choose the correct option from the provided answers: In conduction , heat is transferred from molecule to molecule by contact. Warmer molecules vibrate faster than cooler ones. They bump into the cooler molecules. When they do, they transfer some of their energy. Conduction happens mainly in the lower atmosphere. Can you explain why?. Choices: - higher atmosphere - thermosphere - mesosphere - lower atmosphere A:
lower atmosphere