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In biology, the biological cost or metabolic price is a measure of the increased energy metabolism that is required to achieve a function. Drug resistance in microbiology, for instance, has a very high metabolic price, [1] especially for antibiotic resistance. [2]
To construct an optimality model, the behavior must first be clearly defined. Then, descriptions of how the costs and benefits vary with the way the behavior is performed must be obtained. [1] Examples of benefits and costs include direct fitness measures like offspring produced, change in lifespan, time spent or gained, or energy spent and gained.
In life history theory, the cost of reproduction hypothesis is the idea that reproduction is costly in terms of future survival and reproduction. This is mediated by various mechanisms, with the two most prominent being hormonal regulation and differential allocation of internal resources.
The curve represents the energy gain per cost (E) for adopting foraging strategy x. Energy gain per cost is the currency being optimized. The constraints of the system determine the shape of this curve. The optimal decision rule (x*) is the strategy for which the currency, energy gain per costs, is the greatest.
The Food and Agriculture Organization (FAO) Food Price Index 1961–2021 in nominal and real terms. The Real Price Index is the Nominal Price Index deflated by the World Bank Manufactures Unit Value Index (MUV). Years 2014–2016 is 100. Food prices refer to the average price level for food across countries, regions and on a global scale. [1]
Seed production is limited by some seed syndromes because of their cost to the plant. Therefore, seed dispersal syndromes will evolve in a plant when the trait benefit outweighs the cost. [ 1 ] The seed dispersers themselves play an essential role in syndrome evolution. [ 10 ]
The unit of construction costs is g g −1 (g glucose required / g biomass produced). Theoretically, if the biochemical pathways to construct all of the thousands of different compounds of an organism would be known, as well as the concentrations of all those compounds, construction costs could be simply calculated as the product of concentration and construction costs, summed over all ...
An aggregate fruit is also called an aggregation, or etaerio; it develops from a single flower that presents numerous simple pistils. [17] Each pistil contains one carpel; together, they form a fruitlet. The ultimate (fruiting) development of the aggregation of pistils is called an aggregate fruit, etaerio fruit, or simply an etaerio.