All birds have feathers, and are the only animals that do! 1  Feathers provide protection (from weather and injury). 2  Feathers serve as insulation from cold and heat. 3  Feathers help birds attract mates.
A) John. B. Watson B) Edward Tolman C) Ivan Pavlov D) B. F. Skinner Ans: B Difficulty: Difficult Page: 26 Section: The Neo-Behaviorism of Edward Tolman 67. The idea that rats have a cognitive map of a maze is supported by the finding that rats: A) only learn to navigate the maze if a food reward is given at the end....
Using knock-in genetic engineering, Jacobs et al. have effectively created a mouse with a retina like that of a New World monkey, with one very important difference: mice do not have well-developed form vision, and do not have midget cells. Mice do not already have the hardware that many assume is a critical first step to the evolution of color vision. Despite this, three of the five transgenic heterozygote female mice tested by the authors could discriminate reds from greens, showing color matches remarkably similar to humans .