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. b) cannot navigate the maze if their usual route is blocked. c) can navigate the maze even if they start from a novel position. d) require only one trial to learn the layout of a maze.

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

answer; biological;

answer; they are called (pebbling);