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U2L03

AP Biology B

QuestionAnswer
The process by which an organism takes in and makes use of food substances. Nutrition
A mixture of particles derived from rock, living organisms, and decaying organic material (humus). Topsoil
The most fertile soil type, made up of roughly equal amounts of sand, silt, and clay. Loam
Long-term productive farming methods that are environmentally safe. Sustainable agriculture
(1) The union of haploid gametes to produce a diploid zygote. (2) The addition of mineral nutrients to the soil. Fertilization
A plowing technique that minimally disturbs the soil, thereby reducing soil loss. No-till agriculture
An emerging technology that seeks to reclaim contaminated areas by taking advantage of some plant species' ability to extract heavy metals and other pollutants from the soil and to concentrate them in easily harvested portions of the plant. Phytoremediation
A method in which plants are grown in mineral solutions rather than in soil. Hydroponic culture
An essential element that an organism must obtain in relatively large amounts. Macronutrients
An essential element that an organism needs in very small amounts. Micronutrients
The soil region close to plant roots and characterized by a high level of microbiological activity. Rhizosphere
A swelling on the root of a legume. Nodules are composed of plant cells that contain nitrogen-fixing bacteria of the genus Rhizobium. Nodules
A form of the bacterium Rhizobium contained within the vesicles formed by the root cells of a root nodule. Bacteroids
The practice of planting nonlegumes one year and legumes in alternating years to restore concentrations of fixed nitrogen in the soil. Crop rotation
Association of a fungus with a plant root system in which the fungus causes the invagination of the host (plant) cells' plasma membranes. Arbuscular mycorrhiza
A mutualistic association of plant roots and fungus. Mycorrhiza
Created by: jtaylor422
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