Efficiency of searching (a). The Lotka-Volterra model, often recognized as predator-prey dynamics, includes a set of differential equations that are non-linear and first-order. This model helps explain fluctuations within biological systems as two species interact, one being the predator and the other the prey. In the context of the question, the phrase "searching efficiency (a)" characterizes the rate at which predators change in relation to their ability to detect, capture, and consume prey.
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Answer:
The answer is A) Active transport involves moving substances against the concentration gradient.
Explanation:
Facilitated diffusion refers to the process where other molecules assist in the transport across the cellular membrane. This usually involves integral proteins that aid in moving a molecule. Since facilitated diffusion occurs from areas of higher concentration to lower concentration, it is considered a passive transport method.
In contrast, active transport refers to the process of moving molecules from a location of lower concentration to one of higher concentration, which requires energy to occur.