Q: What term means a failure, insufficiency, or delay in the response of the immune system, which may be acquired or inherited? Read this paragraph and choose the correct option from the provided answers: Immunodeficiency Immunodeficiency is a failure, insufficiency, or delay in the response of the immune system, which may be acquired or inherited. Immunodeficiency can allow pathogens or tumor cells to gain a foothold and replicate or proliferate to high enough levels so that the immune system becomes overwhelmed. Immunodeficiency can be acquired as a result of infection with certain pathogens that attack the cells of the immune system itself (such as HIV), chemical exposure (including certain medical treatments such as chemotherapy), malnutrition, or extreme stress. For instance, radiation exposure can destroy populations of lymphocytes and elevate an individual's susceptibility to infections and cancer. Rarely, primary immunodeficiencies that are present from birth may also occur. For example, severe combined immunodeficiency disease (SCID) is a condition in which children are born without functioning B or T cells. Choices: - anemia - pathogenic - vitamin deficiency - immunodeficiency A:
immunodeficiency
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Q: What landform occurs most often along plate boundaries? Read this paragraph and choose the correct option from the provided answers: Volcanoes occur most often along plate boundaries. Choices: - sinkholes - geysers - dunes - volcanoes A:
volcanoes
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Q: Most ferns produce the same type of spores and are therefore called what? Read this paragraph and choose the correct option from the provided answers: To see an animation of the lifecycle of a fern and to test your knowledge, go to the website (http://openstaxcollege. org/ l/fern_life_cycle) . Most ferns produce the same type of spores and are therefore homosporous. The diploid sporophyte is the most conspicuous stage of the lifecycle. On the underside of its mature fronds, sori (singular, sorus) form as small clusters where sporangia develop (Figure 25.23). Choices: - seeds - sporozoans - heterosporous - homosporous A:
homosporous
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Q: What type of virus can cause painful sores on the mouth and genitals? Read this paragraph and choose the correct option from the provided answers: This lip blister, or cold sore, is caused by a herpes virus. The virus is closely related to the virus that causes genital herpes. The genital herpes virus causes similar blisters on the genitals. If you've ever had a cold sore, you know how painful they can be. Genital herpes blisters are also painful. Choices: - Aids - gonorrhea - syphilis - herpes A:
herpes
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