Things going from low concentration to high concentration with ATP. An example would be the sodium potassium pump
They have to have a higher density than water to have the ability to stay on the sea floor. Otherwise they would just float to the surface of the water
I dont have the word bank
The porcupine is a rodent with an unusual trait. Porcupines have sharp spines or quills that help protect it against its predators. This trait is different from other rodents because of its needle like quills. This animal is also similar to that of a hedgehogs.
