The great hornbill and the toucan both eat the same fruit, insects, and nuts. they both live in the rainforest. their large bills function to get food and also as warning coloration. which of the following is a limiting factor to the toucan population?
bill coloration
genetic variability
competition

A limiting factor to the toucan population is competition.

Explanation

Competition is an interaction between organisms in which the organisms contend emulously for the same resource such as food and territory. From the question, the great hornbill and the toucan have the same adaptation (large bills to get food and warning coloration), eat the same food (fruit, insects, and nuts), and they both live in the same habitat (rainforest). Competition would be a limiting factor to the toucan population as the two organisms will compete for food and habitat.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.