Organisms can have positive or negative impacts on the ecosystem they live in. the cane toad, or rhinella marina, was introduced to the hawaiian islands in 1932 by sugar cane farmers. farmers released the toads in their crops to control pests that were damaging the sugar cane. the cane toad has few natural predators, as it secretes a poisonous toxin from its skin that deters larger organisms from eating it. as a result, the cane toad population thrived and grew to number hundreds of thousands by 1935.

What must be done to breed dogs for a partical trait

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.