Which of the following is not one of charles darwin's proposed criteria for traits to evolve through natural selection?
a. the trait must be inheritable.
b. the trait must be able to be learned.
c. the trait must vary.
d. the trait must make the individual more fit to survive.

Why do you think kush in nubia is not as well-known as egypt? ( me with my exit ticket)

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.

Which of these is the best example of a cause-and-effect chain of events? 1. alonzo went to the music festival. 2. carmen went to the same music festival. 3. alonzo met carmen at the music festival. 1. yosef bought a new car from a dealership. 2. bailey bought a car from the same dealership. 3. bailey paid more for his car than yosef did. 1. the high school football team played a game on friday night. 2. the drama club put on a play on friday night. 3. maya watched the football game instead of the play. 1. a fast food restaurant ran an advertisement on television. 2. hank saw the advertisement and got hungry. 3. hank went to the fast food restaurant and bought food.